Stanley Smith v. Union Pacific Rail ( 2012 )


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  •                             NONPRECEDENTIAL DISPOSITION
    To be cited only in accordance with
    Fed. R. App. P. 32.1
    United States Court of Appeals
    For the Seventh Circuit
    Chicago, Illinois 60604
    Argued February 29, 2012
    Decided April 5, 2012
    Before
    WILLIAM J. BAUER, Circuit Judge
    ILANA DIAMOND ROVNER, Circuit Judge
    DIANE P. WOOD, Circuit Judge
    No. 11-2750
    STANLEY SMITH,                                      Appeal from the United States District
    Plaintiff-Appellant,                           Court for the Northern District of Illinois,
    Eastern Division
    v.                                           No. 11 C 986
    UNION PACIFIC RAILROAD                              Robert M. Dow, Jr.
    COMPANY,                                            Judge.
    Defendant-Appellee.
    ORDER
    Stanley Smith claims that Union Pacific promised him that he would be reinstated as
    an engineer after receiving treatment for alcoholism. After successful treatment, and upon
    learning that Union Pacific had no plans to reinstate him, he filed a charge of discrimination
    and sued under the Americans with Disabilities Act, 
    42 U.S.C. § 12101
     et seq. The district
    court determined that his charge was untimely and dismissed his complaint with prejudice.
    Smith appeals, arguing that his charge was timely and, in the alternative, that dismissal
    should have been without prejudice. We conclude that, although dismissal was proper, it
    should have been without prejudice because Smith may be able to cure the deficiencies in
    the complaint and surmount the company’s affirmative defense of untimeliness.
    NONPRECEDENTIAL DISPOSITION
    To be cited only in accordance with
    Fed. R. App. P. 32.1
    United States Court of Appeals
    For the Seventh Circuit
    Chicago, Illinois 60604
    Argued February 29, 2012
    Decided April 5, 2012
    Before
    WILLIAM J. BAUER, Circuit Judge
    ILANA DIAMOND ROVNER, Circuit Judge
    DIANE P. WOOD, Circuit Judge
    No. 11-2750
    STANLEY SMITH,                                      Appeal from the United States District
    Plaintiff-Appellant,                           Court for the Northern District of Illinois,
    Eastern Division
    v.                                           No. 11 C 986
    UNION PACIFIC RAILROAD                              Robert M. Dow, Jr.
    COMPANY,                                            Judge.
    Defendant-Appellee.
    ORDER
    Stanley Smith claims that Union Pacific promised him that he would be reinstated as
    an engineer after receiving treatment for alcoholism. After successful treatment, and upon
    learning that Union Pacific had no plans to reinstate him, he filed a charge of discrimination
    and sued under the Americans with Disabilities Act, 
    42 U.S.C. § 12101
     et seq. The district
    court determined that his charge was untimely and dismissed his complaint with prejudice.
    Smith appeals, arguing that his charge was timely and, in the alternative, that dismissal
    should have been without prejudice. We conclude that, although dismissal was proper, it
    should have been without prejudice because Smith may be able to cure the deficiencies in
    the complaint and surmount the company’s affirmative defense of untimeliness.
    NONPRECEDENTIAL DISPOSITION
    To be cited only in accordance with
    Fed. R. App. P. 32.1
    United States Court of Appeals
    For the Seventh Circuit
    Chicago, Illinois 60604
    Argued February 29, 2012
    Decided April 5, 2012
    Before
    WILLIAM J. BAUER, Circuit Judge
    ILANA DIAMOND ROVNER, Circuit Judge
    DIANE P. WOOD, Circuit Judge
    No. 11-2750
    STANLEY SMITH,                                      Appeal from the United States District
    Plaintiff-Appellant,                           Court for the Northern District of Illinois,
    Eastern Division
    v.                                           No. 11 C 986
    UNION PACIFIC RAILROAD                              Robert M. Dow, Jr.
    COMPANY,                                            Judge.
    Defendant-Appellee.
    ORDER
    Stanley Smith claims that Union Pacific promised him that he would be reinstated as
    an engineer after receiving treatment for alcoholism. After successful treatment, and upon
    learning that Union Pacific had no plans to reinstate him, he filed a charge of discrimination
    and sued under the Americans with Disabilities Act, 
    42 U.S.C. § 12101
     et seq. The district
    court determined that his charge was untimely and dismissed his complaint with prejudice.
    Smith appeals, arguing that his charge was timely and, in the alternative, that dismissal
    should have been without prejudice. We conclude that, although dismissal was proper, it
    should have been without prejudice because Smith may be able to cure the deficiencies in
    the complaint and surmount the company’s affirmative defense of untimeliness.
    NONPRECEDENTIAL DISPOSITION
    To be cited only in accordance with
    Fed. R. App. P. 32.1
    United States Court of Appeals
    For the Seventh Circuit
    Chicago, Illinois 60604
    Argued February 29, 2012
    Decided April 5, 2012
    Before
    WILLIAM J. BAUER, Circuit Judge
    ILANA DIAMOND ROVNER, Circuit Judge
    DIANE P. WOOD, Circuit Judge
    No. 11-2750
    STANLEY SMITH,                                      Appeal from the United States District
    Plaintiff-Appellant,                           Court for the Northern District of Illinois,
    Eastern Division
    v.                                           No. 11 C 986
    UNION PACIFIC RAILROAD                              Robert M. Dow, Jr.
    COMPANY,                                            Judge.
    Defendant-Appellee.
    ORDER
    Stanley Smith claims that Union Pacific promised him that he would be reinstated as
    an engineer after receiving treatment for alcoholism. After successful treatment, and upon
    learning that Union Pacific had no plans to reinstate him, he filed a charge of discrimination
    and sued under the Americans with Disabilities Act, 
    42 U.S.C. § 12101
     et seq. The district
    court determined that his charge was untimely and dismissed his complaint with prejudice.
    Smith appeals, arguing that his charge was timely and, in the alternative, that dismissal
    should have been without prejudice. We conclude that, although dismissal was proper, it
    should have been without prejudice because Smith may be able to cure the deficiencies in
    the complaint and surmount the company’s affirmative defense of untimeliness.
    NONPRECEDENTIAL DISPOSITION
    To be cited only in accordance with
    Fed. R. App. P. 32.1
    United States Court of Appeals
    For the Seventh Circuit
    Chicago, Illinois 60604
    Argued February 29, 2012
    Decided April 5, 2012
    Before
    WILLIAM J. BAUER, Circuit Judge
    ILANA DIAMOND ROVNER, Circuit Judge
    DIANE P. WOOD, Circuit Judge
    No. 11-2750
    STANLEY SMITH,                                      Appeal from the United States District
    Plaintiff-Appellant,                           Court for the Northern District of Illinois,
    Eastern Division
    v.                                           No. 11 C 986
    UNION PACIFIC RAILROAD                              Robert M. Dow, Jr.
    COMPANY,                                            Judge.
    Defendant-Appellee.
    ORDER
    Stanley Smith claims that Union Pacific promised him that he would be reinstated as
    an engineer after receiving treatment for alcoholism. After successful treatment, and upon
    learning that Union Pacific had no plans to reinstate him, he filed a charge of discrimination
    and sued under the Americans with Disabilities Act, 
    42 U.S.C. § 12101
     et seq. The district
    court determined that his charge was untimely and dismissed his complaint with prejudice.
    Smith appeals, arguing that his charge was timely and, in the alternative, that dismissal
    should have been without prejudice. We conclude that, although dismissal was proper, it
    should have been without prejudice because Smith may be able to cure the deficiencies in
    the complaint and surmount the company’s affirmative defense of untimeliness.
    NONPRECEDENTIAL DISPOSITION
    To be cited only in accordance with
    Fed. R. App. P. 32.1
    United States Court of Appeals
    For the Seventh Circuit
    Chicago, Illinois 60604
    Argued February 29, 2012
    Decided April 5, 2012
    Before
    WILLIAM J. BAUER, Circuit Judge
    ILANA DIAMOND ROVNER, Circuit Judge
    DIANE P. WOOD, Circuit Judge
    No. 11-2750
    STANLEY SMITH,                                      Appeal from the United States District
    Plaintiff-Appellant,                           Court for the Northern District of Illinois,
    Eastern Division
    v.                                           No. 11 C 986
    UNION PACIFIC RAILROAD                              Robert M. Dow, Jr.
    COMPANY,                                            Judge.
    Defendant-Appellee.
    ORDER
    Stanley Smith claims that Union Pacific promised him that he would be reinstated as
    an engineer after receiving treatment for alcoholism. After successful treatment, and upon
    learning that Union Pacific had no plans to reinstate him, he filed a charge of discrimination
    and sued under the Americans with Disabilities Act, 
    42 U.S.C. § 12101
     et seq. The district
    court determined that his charge was untimely and dismissed his complaint with prejudice.
    Smith appeals, arguing that his charge was timely and, in the alternative, that dismissal
    should have been without prejudice. We conclude that, although dismissal was proper, it
    should have been without prejudice because Smith may be able to cure the deficiencies in
    the complaint and surmount the company’s affirmative defense of untimeliness.
    NONPRECEDENTIAL DISPOSITION
    To be cited only in accordance with
    Fed. R. App. P. 32.1
    United States Court of Appeals
    For the Seventh Circuit
    Chicago, Illinois 60604
    Argued February 29, 2012
    Decided April 5, 2012
    Before
    WILLIAM J. BAUER, Circuit Judge
    ILANA DIAMOND ROVNER, Circuit Judge
    DIANE P. WOOD, Circuit Judge
    No. 11-2750
    STANLEY SMITH,                                      Appeal from the United States District
    Plaintiff-Appellant,                           Court for the Northern District of Illinois,
    Eastern Division
    v.                                           No. 11 C 986
    UNION PACIFIC RAILROAD                              Robert M. Dow, Jr.
    COMPANY,                                            Judge.
    Defendant-Appellee.
    ORDER
    Stanley Smith claims that Union Pacific promised him that he would be reinstated as
    an engineer after receiving treatment for alcoholism. After successful treatment, and upon
    learning that Union Pacific had no plans to reinstate him, he filed a charge of discrimination
    and sued under the Americans with Disabilities Act, 
    42 U.S.C. § 12101
     et seq. The district
    court determined that his charge was untimely and dismissed his complaint with prejudice.
    Smith appeals, arguing that his charge was timely and, in the alternative, that dismissal
    should have been without prejudice. We conclude that, although dismissal was proper, it
    should have been without prejudice because Smith may be able to cure the deficiencies in
    the complaint and surmount the company’s affirmative defense of untimeliness.
    NONPRECEDENTIAL DISPOSITION
    To be cited only in accordance with
    Fed. R. App. P. 32.1
    United States Court of Appeals
    For the Seventh Circuit
    Chicago, Illinois 60604
    Argued February 29, 2012
    Decided April 5, 2012
    Before
    WILLIAM J. BAUER, Circuit Judge
    ILANA DIAMOND ROVNER, Circuit Judge
    DIANE P. WOOD, Circuit Judge
    No. 11-2750
    STANLEY SMITH,                                      Appeal from the United States District
    Plaintiff-Appellant,                           Court for the Northern District of Illinois,
    Eastern Division
    v.                                           No. 11 C 986
    UNION PACIFIC RAILROAD                              Robert M. Dow, Jr.
    COMPANY,                                            Judge.
    Defendant-Appellee.
    ORDER
    Stanley Smith claims that Union Pacific promised him that he would be reinstated as
    an engineer after receiving treatment for alcoholism. After successful treatment, and upon
    learning that Union Pacific had no plans to reinstate him, he filed a charge of discrimination
    and sued under the Americans with Disabilities Act, 
    42 U.S.C. § 12101
     et seq. The district
    court determined that his charge was untimely and dismissed his complaint with prejudice.
    Smith appeals, arguing that his charge was timely and, in the alternative, that dismissal
    should have been without prejudice. We conclude that, although dismissal was proper, it
    should have been without prejudice because Smith may be able to cure the deficiencies in
    the complaint and surmount the company’s affirmative defense of untimeliness.
    NONPRECEDENTIAL DISPOSITION
    To be cited only in accordance with
    Fed. R. App. P. 32.1
    United States Court of Appeals
    For the Seventh Circuit
    Chicago, Illinois 60604
    Argued February 29, 2012
    Decided April 5, 2012
    Before
    WILLIAM J. BAUER, Circuit Judge
    ILANA DIAMOND ROVNER, Circuit Judge
    DIANE P. WOOD, Circuit Judge
    No. 11-2750
    STANLEY SMITH,                                      Appeal from the United States District
    Plaintiff-Appellant,                           Court for the Northern District of Illinois,
    Eastern Division
    v.                                           No. 11 C 986
    UNION PACIFIC RAILROAD                              Robert M. Dow, Jr.
    COMPANY,                                            Judge.
    Defendant-Appellee.
    ORDER
    Stanley Smith claims that Union Pacific promised him that he would be reinstated as
    an engineer after receiving treatment for alcoholism. After successful treatment, and upon
    learning that Union Pacific had no plans to reinstate him, he filed a charge of discrimination
    and sued under the Americans with Disabilities Act, 
    42 U.S.C. § 12101
     et seq. The district
    court determined that his charge was untimely and dismissed his complaint with prejudice.
    Smith appeals, arguing that his charge was timely and, in the alternative, that dismissal
    should have been without prejudice. We conclude that, although dismissal was proper, it
    should have been without prejudice because Smith may be able to cure the deficiencies in
    the complaint and surmount the company’s affirmative defense of untimeliness.
    NONPRECEDENTIAL DISPOSITION
    To be cited only in accordance with
    Fed. R. App. P. 32.1
    United States Court of Appeals
    For the Seventh Circuit
    Chicago, Illinois 60604
    Argued February 29, 2012
    Decided April 5, 2012
    Before
    WILLIAM J. BAUER, Circuit Judge
    ILANA DIAMOND ROVNER, Circuit Judge
    DIANE P. WOOD, Circuit Judge
    No. 11-2750
    STANLEY SMITH,                                      Appeal from the United States District
    Plaintiff-Appellant,                           Court for the Northern District of Illinois,
    Eastern Division
    v.                                           No. 11 C 986
    UNION PACIFIC RAILROAD                              Robert M. Dow, Jr.
    COMPANY,                                            Judge.
    Defendant-Appellee.
    ORDER
    Stanley Smith claims that Union Pacific promised him that he would be reinstated as
    an engineer after receiving treatment for alcoholism. After successful treatment, and upon
    learning that Union Pacific had no plans to reinstate him, he filed a charge of discrimination
    and sued under the Americans with Disabilities Act, 
    42 U.S.C. § 12101
     et seq. The district
    court determined that his charge was untimely and dismissed his complaint with prejudice.
    Smith appeals, arguing that his charge was timely and, in the alternative, that dismissal
    should have been without prejudice. We conclude that, although dismissal was proper, it
    should have been without prejudice because Smith may be able to cure the deficiencies in
    the complaint and surmount the company’s affirmative defense of untimeliness.
    NONPRECEDENTIAL DISPOSITION
    To be cited only in accordance with
    Fed. R. App. P. 32.1
    United States Court of Appeals
    For the Seventh Circuit
    Chicago, Illinois 60604
    Argued February 29, 2012
    Decided April 5, 2012
    Before
    WILLIAM J. BAUER, Circuit Judge
    ILANA DIAMOND ROVNER, Circuit Judge
    DIANE P. WOOD, Circuit Judge
    No. 11-2750
    STANLEY SMITH,                                      Appeal from the United States District
    Plaintiff-Appellant,                           Court for the Northern District of Illinois,
    Eastern Division
    v.                                           No. 11 C 986
    UNION PACIFIC RAILROAD                              Robert M. Dow, Jr.
    COMPANY,                                            Judge.
    Defendant-Appellee.
    ORDER
    Stanley Smith claims that Union Pacific promised him that he would be reinstated as
    an engineer after receiving treatment for alcoholism. After successful treatment, and upon
    learning that Union Pacific had no plans to reinstate him, he filed a charge of discrimination
    and sued under the Americans with Disabilities Act, 
    42 U.S.C. § 12101
     et seq. The district
    court determined that his charge was untimely and dismissed his complaint with prejudice.
    Smith appeals, arguing that his charge was timely and, in the alternative, that dismissal
    should have been without prejudice. We conclude that, although dismissal was proper, it
    should have been without prejudice because Smith may be able to cure the deficiencies in
    the complaint and surmount the company’s affirmative defense of untimeliness.
    NONPRECEDENTIAL DISPOSITION
    To be cited only in accordance with
    Fed. R. App. P. 32.1
    United States Court of Appeals
    For the Seventh Circuit
    Chicago, Illinois 60604
    Argued February 29, 2012
    Decided April 5, 2012
    Before
    WILLIAM J. BAUER, Circuit Judge
    ILANA DIAMOND ROVNER, Circuit Judge
    DIANE P. WOOD, Circuit Judge
    No. 11-2750
    STANLEY SMITH,                                      Appeal from the United States District
    Plaintiff-Appellant,                           Court for the Northern District of Illinois,
    Eastern Division
    v.                                           No. 11 C 986
    UNION PACIFIC RAILROAD                              Robert M. Dow, Jr.
    COMPANY,                                            Judge.
    Defendant-Appellee.
    ORDER
    Stanley Smith claims that Union Pacific promised him that he would be reinstated as
    an engineer after receiving treatment for alcoholism. After successful treatment, and upon
    learning that Union Pacific had no plans to reinstate him, he filed a charge of discrimination
    and sued under the Americans with Disabilities Act, 
    42 U.S.C. § 12101
     et seq. The district
    court determined that his charge was untimely and dismissed his complaint with prejudice.
    Smith appeals, arguing that his charge was timely and, in the alternative, that dismissal
    should have been without prejudice. We conclude that, although dismissal was proper, it
    should have been without prejudice because Smith may be able to cure the deficiencies in
    the complaint and surmount the company’s affirmative defense of untimeliness.
    NONPRECEDENTIAL DISPOSITION
    To be cited only in accordance with
    Fed. R. App. P. 32.1
    United States Court of Appeals
    For the Seventh Circuit
    Chicago, Illinois 60604
    Argued February 29, 2012
    Decided April 5, 2012
    Before
    WILLIAM J. BAUER, Circuit Judge
    ILANA DIAMOND ROVNER, Circuit Judge
    DIANE P. WOOD, Circuit Judge
    No. 11-2750
    STANLEY SMITH,                                      Appeal from the United States District
    Plaintiff-Appellant,                           Court for the Northern District of Illinois,
    Eastern Division
    v.                                           No. 11 C 986
    UNION PACIFIC RAILROAD                              Robert M. Dow, Jr.
    COMPANY,                                            Judge.
    Defendant-Appellee.
    ORDER
    Stanley Smith claims that Union Pacific promised him that he would be reinstated as
    an engineer after receiving treatment for alcoholism. After successful treatment, and upon
    learning that Union Pacific had no plans to reinstate him, he filed a charge of discrimination
    and sued under the Americans with Disabilities Act, 
    42 U.S.C. § 12101
     et seq. The district
    court determined that his charge was untimely and dismissed his complaint with prejudice.
    Smith appeals, arguing that his charge was timely and, in the alternative, that dismissal
    should have been without prejudice. We conclude that, although dismissal was proper, it
    should have been without prejudice because Smith may be able to cure the deficiencies in
    the complaint and surmount the company’s affirmative defense of untimeliness.
    NONPRECEDENTIAL DISPOSITION
    To be cited only in accordance with
    Fed. R. App. P. 32.1
    United States Court of Appeals
    For the Seventh Circuit
    Chicago, Illinois 60604
    Argued February 29, 2012
    Decided April 5, 2012
    Before
    WILLIAM J. BAUER, Circuit Judge
    ILANA DIAMOND ROVNER, Circuit Judge
    DIANE P. WOOD, Circuit Judge
    No. 11-2750
    STANLEY SMITH,                                      Appeal from the United States District
    Plaintiff-Appellant,                           Court for the Northern District of Illinois,
    Eastern Division
    v.                                           No. 11 C 986
    UNION PACIFIC RAILROAD                              Robert M. Dow, Jr.
    COMPANY,                                            Judge.
    Defendant-Appellee.
    ORDER
    Stanley Smith claims that Union Pacific promised him that he would be reinstated as
    an engineer after receiving treatment for alcoholism. After successful treatment, and upon
    learning that Union Pacific had no plans to reinstate him, he filed a charge of discrimination
    and sued under the Americans with Disabilities Act, 
    42 U.S.C. § 12101
     et seq. The district
    court determined that his charge was untimely and dismissed his complaint with prejudice.
    Smith appeals, arguing that his charge was timely and, in the alternative, that dismissal
    should have been without prejudice. We conclude that, although dismissal was proper, it
    should have been without prejudice because Smith may be able to cure the deficiencies in
    the complaint and surmount the company’s affirmative defense of untimeliness.
    NONPRECEDENTIAL DISPOSITION
    To be cited only in accordance with
    Fed. R. App. P. 32.1
    United States Court of Appeals
    For the Seventh Circuit
    Chicago, Illinois 60604
    Argued February 29, 2012
    Decided April 5, 2012
    Before
    WILLIAM J. BAUER, Circuit Judge
    ILANA DIAMOND ROVNER, Circuit Judge
    DIANE P. WOOD, Circuit Judge
    No. 11-2750
    STANLEY SMITH,                                      Appeal from the United States District
    Plaintiff-Appellant,                           Court for the Northern District of Illinois,
    Eastern Division
    v.                                           No. 11 C 986
    UNION PACIFIC RAILROAD                              Robert M. Dow, Jr.
    COMPANY,                                            Judge.
    Defendant-Appellee.
    ORDER
    Stanley Smith claims that Union Pacific promised him that he would be reinstated as
    an engineer after receiving treatment for alcoholism. After successful treatment, and upon
    learning that Union Pacific had no plans to reinstate him, he filed a charge of discrimination
    and sued under the Americans with Disabilities Act, 
    42 U.S.C. § 12101
     et seq. The district
    court determined that his charge was untimely and dismissed his complaint with prejudice.
    Smith appeals, arguing that his charge was timely and, in the alternative, that dismissal
    should have been without prejudice. We conclude that, although dismissal was proper, it
    should have been without prejudice because Smith may be able to cure the deficiencies in
    the complaint and surmount the company’s affirmative defense of untimeliness.
    NONPRECEDENTIAL DISPOSITION
    To be cited only in accordance with
    Fed. R. App. P. 32.1
    United States Court of Appeals
    For the Seventh Circuit
    Chicago, Illinois 60604
    Argued February 29, 2012
    Decided April 5, 2012
    Before
    WILLIAM J. BAUER, Circuit Judge
    ILANA DIAMOND ROVNER, Circuit Judge
    DIANE P. WOOD, Circuit Judge
    No. 11-2750
    STANLEY SMITH,                                      Appeal from the United States District
    Plaintiff-Appellant,                           Court for the Northern District of Illinois,
    Eastern Division
    v.                                           No. 11 C 986
    UNION PACIFIC RAILROAD                              Robert M. Dow, Jr.
    COMPANY,                                            Judge.
    Defendant-Appellee.
    ORDER
    Stanley Smith claims that Union Pacific promised him that he would be reinstated as
    an engineer after receiving treatment for alcoholism. After successful treatment, and upon
    learning that Union Pacific had no plans to reinstate him, he filed a charge of discrimination
    and sued under the Americans with Disabilities Act, 
    42 U.S.C. § 12101
     et seq. The district
    court determined that his charge was untimely and dismissed his complaint with prejudice.
    Smith appeals, arguing that his charge was timely and, in the alternative, that dismissal
    should have been without prejudice. We conclude that, although dismissal was proper, it
    should have been without prejudice because Smith may be able to cure the deficiencies in
    the complaint and surmount the company’s affirmative defense of untimeliness.
    NONPRECEDENTIAL DISPOSITION
    To be cited only in accordance with
    Fed. R. App. P. 32.1
    United States Court of Appeals
    For the Seventh Circuit
    Chicago, Illinois 60604
    Argued February 29, 2012
    Decided April 5, 2012
    Before
    WILLIAM J. BAUER, Circuit Judge
    ILANA DIAMOND ROVNER, Circuit Judge
    DIANE P. WOOD, Circuit Judge
    No. 11-2750
    STANLEY SMITH,                                      Appeal from the United States District
    Plaintiff-Appellant,                           Court for the Northern District of Illinois,
    Eastern Division
    v.                                           No. 11 C 986
    UNION PACIFIC RAILROAD                              Robert M. Dow, Jr.
    COMPANY,                                            Judge.
    Defendant-Appellee.
    ORDER
    Stanley Smith claims that Union Pacific promised him that he would be reinstated as
    an engineer after receiving treatment for alcoholism. After successful treatment, and upon
    learning that Union Pacific had no plans to reinstate him, he filed a charge of discrimination
    and sued under the Americans with Disabilities Act, 
    42 U.S.C. § 12101
     et seq. The district
    court determined that his charge was untimely and dismissed his complaint with prejudice.
    Smith appeals, arguing that his charge was timely and, in the alternative, that dismissal
    should have been without prejudice. We conclude that, although dismissal was proper, it
    should have been without prejudice because Smith may be able to cure the deficiencies in
    the complaint and surmount the company’s affirmative defense of untimeliness.
    NONPRECEDENTIAL DISPOSITION
    To be cited only in accordance with
    Fed. R. App. P. 32.1
    United States Court of Appeals
    For the Seventh Circuit
    Chicago, Illinois 60604
    Argued February 29, 2012
    Decided April 5, 2012
    Before
    WILLIAM J. BAUER, Circuit Judge
    ILANA DIAMOND ROVNER, Circuit Judge
    DIANE P. WOOD, Circuit Judge
    No. 11-2750
    STANLEY SMITH,                                      Appeal from the United States District
    Plaintiff-Appellant,                           Court for the Northern District of Illinois,
    Eastern Division
    v.                                           No. 11 C 986
    UNION PACIFIC RAILROAD                              Robert M. Dow, Jr.
    COMPANY,                                            Judge.
    Defendant-Appellee.
    ORDER
    Stanley Smith claims that Union Pacific promised him that he would be reinstated as
    an engineer after receiving treatment for alcoholism. After successful treatment, and upon
    learning that Union Pacific had no plans to reinstate him, he filed a charge of discrimination
    and sued under the Americans with Disabilities Act, 
    42 U.S.C. § 12101
     et seq. The district
    court determined that his charge was untimely and dismissed his complaint with prejudice.
    Smith appeals, arguing that his charge was timely and, in the alternative, that dismissal
    should have been without prejudice. We conclude that, although dismissal was proper, it
    should have been without prejudice because Smith may be able to cure the deficiencies in
    the complaint and surmount the company’s affirmative defense of untimeliness.
    NONPRECEDENTIAL DISPOSITION
    To be cited only in accordance with
    Fed. R. App. P. 32.1
    United States Court of Appeals
    For the Seventh Circuit
    Chicago, Illinois 60604
    Argued February 29, 2012
    Decided April 5, 2012
    Before
    WILLIAM J. BAUER, Circuit Judge
    ILANA DIAMOND ROVNER, Circuit Judge
    DIANE P. WOOD, Circuit Judge
    No. 11-2750
    STANLEY SMITH,                                      Appeal from the United States District
    Plaintiff-Appellant,                           Court for the Northern District of Illinois,
    Eastern Division
    v.                                           No. 11 C 986
    UNION PACIFIC RAILROAD                              Robert M. Dow, Jr.
    COMPANY,                                            Judge.
    Defendant-Appellee.
    ORDER
    Stanley Smith claims that Union Pacific promised him that he would be reinstated as
    an engineer after receiving treatment for alcoholism. After successful treatment, and upon
    learning that Union Pacific had no plans to reinstate him, he filed a charge of discrimination
    and sued under the Americans with Disabilities Act, 
    42 U.S.C. § 12101
     et seq. The district
    court determined that his charge was untimely and dismissed his complaint with prejudice.
    Smith appeals, arguing that his charge was timely and, in the alternative, that dismissal
    should have been without prejudice. We conclude that, although dismissal was proper, it
    should have been without prejudice because Smith may be able to cure the deficiencies in
    the complaint and surmount the company’s affirmative defense of untimeliness.
    NONPRECEDENTIAL DISPOSITION
    To be cited only in accordance with
    Fed. R. App. P. 32.1
    United States Court of Appeals
    For the Seventh Circuit
    Chicago, Illinois 60604
    Argued February 29, 2012
    Decided April 5, 2012
    Before
    WILLIAM J. BAUER, Circuit Judge
    ILANA DIAMOND ROVNER, Circuit Judge
    DIANE P. WOOD, Circuit Judge
    No. 11-2750
    STANLEY SMITH,                                      Appeal from the United States District
    Plaintiff-Appellant,                           Court for the Northern District of Illinois,
    Eastern Division
    v.                                           No. 11 C 986
    UNION PACIFIC RAILROAD                              Robert M. Dow, Jr.
    COMPANY,                                            Judge.
    Defendant-Appellee.
    ORDER
    Stanley Smith claims that Union Pacific promised him that he would be reinstated as
    an engineer after receiving treatment for alcoholism. After successful treatment, and upon
    learning that Union Pacific had no plans to reinstate him, he filed a charge of discrimination
    and sued under the Americans with Disabilities Act, 
    42 U.S.C. § 12101
     et seq. The district
    court determined that his charge was untimely and dismissed his complaint with prejudice.
    Smith appeals, arguing that his charge was timely and, in the alternative, that dismissal
    should have been without prejudice. We conclude that, although dismissal was proper, it
    should have been without prejudice because Smith may be able to cure the deficiencies in
    the complaint and surmount the company’s affirmative defense of untimeliness.
    NONPRECEDENTIAL DISPOSITION
    To be cited only in accordance with
    Fed. R. App. P. 32.1
    United States Court of Appeals
    For the Seventh Circuit
    Chicago, Illinois 60604
    Argued February 29, 2012
    Decided April 5, 2012
    Before
    WILLIAM J. BAUER, Circuit Judge
    ILANA DIAMOND ROVNER, Circuit Judge
    DIANE P. WOOD, Circuit Judge
    No. 11-2750
    STANLEY SMITH,                                      Appeal from the United States District
    Plaintiff-Appellant,                           Court for the Northern District of Illinois,
    Eastern Division
    v.                                           No. 11 C 986
    UNION PACIFIC RAILROAD                              Robert M. Dow, Jr.
    COMPANY,                                            Judge.
    Defendant-Appellee.
    ORDER
    Stanley Smith claims that Union Pacific promised him that he would be reinstated as
    an engineer after receiving treatment for alcoholism. After successful treatment, and upon
    learning that Union Pacific had no plans to reinstate him, he filed a charge of discrimination
    and sued under the Americans with Disabilities Act, 
    42 U.S.C. § 12101
     et seq. The district
    court determined that his charge was untimely and dismissed his complaint with prejudice.
    Smith appeals, arguing that his charge was timely and, in the alternative, that dismissal
    should have been without prejudice. We conclude that, although dismissal was proper, it
    should have been without prejudice because Smith may be able to cure the deficiencies in
    the complaint and surmount the company’s affirmative defense of untimeliness.
    NONPRECEDENTIAL DISPOSITION
    To be cited only in accordance with
    Fed. R. App. P. 32.1
    United States Court of Appeals
    For the Seventh Circuit
    Chicago, Illinois 60604
    Argued February 29, 2012
    Decided April 5, 2012
    Before
    WILLIAM J. BAUER, Circuit Judge
    ILANA DIAMOND ROVNER, Circuit Judge
    DIANE P. WOOD, Circuit Judge
    No. 11-2750
    STANLEY SMITH,                                      Appeal from the United States District
    Plaintiff-Appellant,                           Court for the Northern District of Illinois,
    Eastern Division
    v.                                           No. 11 C 986
    UNION PACIFIC RAILROAD                              Robert M. Dow, Jr.
    COMPANY,                                            Judge.
    Defendant-Appellee.
    ORDER
    Stanley Smith claims that Union Pacific promised him that he would be reinstated as
    an engineer after receiving treatment for alcoholism. After successful treatment, and upon
    learning that Union Pacific had no plans to reinstate him, he filed a charge of discrimination
    and sued under the Americans with Disabilities Act, 
    42 U.S.C. § 12101
     et seq. The district
    court determined that his charge was untimely and dismissed his complaint with prejudice.
    Smith appeals, arguing that his charge was timely and, in the alternative, that dismissal
    should have been without prejudice. We conclude that, although dismissal was proper, it
    should have been without prejudice because Smith may be able to cure the deficiencies in
    the complaint and surmount the company’s affirmative defense of untimeliness.
    NONPRECEDENTIAL DISPOSITION
    To be cited only in accordance with
    Fed. R. App. P. 32.1
    United States Court of Appeals
    For the Seventh Circuit
    Chicago, Illinois 60604
    Argued February 29, 2012
    Decided April 5, 2012
    Before
    WILLIAM J. BAUER, Circuit Judge
    ILANA DIAMOND ROVNER, Circuit Judge
    DIANE P. WOOD, Circuit Judge
    No. 11-2750
    STANLEY SMITH,                                      Appeal from the United States District
    Plaintiff-Appellant,                           Court for the Northern District of Illinois,
    Eastern Division
    v.                                           No. 11 C 986
    UNION PACIFIC RAILROAD                              Robert M. Dow, Jr.
    COMPANY,                                            Judge.
    Defendant-Appellee.
    ORDER
    Stanley Smith claims that Union Pacific promised him that he would be reinstated as
    an engineer after receiving treatment for alcoholism. After successful treatment, and upon
    learning that Union Pacific had no plans to reinstate him, he filed a charge of discrimination
    and sued under the Americans with Disabilities Act, 
    42 U.S.C. § 12101
     et seq. The district
    court determined that his charge was untimely and dismissed his complaint with prejudice.
    Smith appeals, arguing that his charge was timely and, in the alternative, that dismissal
    should have been without prejudice. We conclude that, although dismissal was proper, it
    should have been without prejudice because Smith may be able to cure the deficiencies in
    the complaint and surmount the company’s affirmative defense of untimeliness.
    No. 11-2750                                                                               Page 2
    We construe the allegations in the complaint in the light most favorable to Smith. See
    Golden v. Helen Sigman & Assocs., Ltd., 
    611 F.3d 356
    , 360 (7th Cir. 2010). Smith alleged that in
    1998 he began working for Union Pacific as an engineer. A year later he underwent
    treatment for alcoholism and later returned to service. He voluntarily enrolled in an
    outpatient treatment program at Rush Behavioral Health Center in 2005, at which time
    Union Pacific agreed to reinstate him after he completed the program. In 2006 he completed
    treatment and sought reinstatement, but the company balked. In 2009 Smith filed a charge
    of discrimination with the EEOC, alleging disability discrimination due to alcoholism. See
    
    42 U.S.C. §§ 12102
    (1), 12114(c)(4). He received a right-to-sue letter and sued the company
    under the ADA.
    After Union Pacific moved to dismiss the complaint under Federal Rule of Civil
    Procedure 12(b)(6) and invoked the affirmative defense that Smith’s charge was untimely,
    Smith filed a response brief supported by an affidavit. In his brief, Smith altered his
    narrative and contended that the discovery rule extended the limitations period and
    rendered his charge timely; he asserted that he did not discover until 2009 that the company
    had deceived him by refusing to honor its 2006 agreement to return him to service after he
    completed an additional treatment program. He also asserted an estoppel argument,
    contending that Union Pacific required him to remain in treatment, while concealing
    medical reports from him which revealed that additional treatment was unnecessary. Smith
    asked the district court to deny the company’s motion to dismiss or, in the alternative, to
    grant leave to amend.
    The district court granted Union Pacific’s motion to dismiss with prejudice. The
    court found Smith’s charge of discrimination untimely because his complaint and affidavit
    plainly reveal that he knew of the refusal to reinstate in 2006 and did not file his charge until
    2009–well after the 300-day deadline for filing a charge. See 
    42 U.S.C. § 12117
    (a). The court
    rejected Smith’s discovery-rule argument, identifying the beginning of the filing period as
    2006–the time that Smith alleged in his complaint that he became aware of the refusal to
    reinstate. The court also rejected Smith’s equitable-estoppel argument on grounds that
    Smith had not pleaded that the company attempted to deceive him. The court did not
    address the altered narrative that Smith advanced in his response brief.
    On appeal Smith first challenges the district court’s ruling that his charge of
    discrimination was untimely. Under the discovery rule, he argues, the charge he filed in
    2009 was timely because not until that year did he discover that the company had reneged
    on its agreement in 2006 to reinstate him; in the intervening period, he asserts, the company
    strung him along with false assurances of reinstatement.
    No. 11-2750                                                                               Page 2
    We construe the allegations in the complaint in the light most favorable to Smith. See
    Golden v. Helen Sigman & Assocs., Ltd., 
    611 F.3d 356
    , 360 (7th Cir. 2010). Smith alleged that in
    1998 he began working for Union Pacific as an engineer. A year later he underwent
    treatment for alcoholism and later returned to service. He voluntarily enrolled in an
    outpatient treatment program at Rush Behavioral Health Center in 2005, at which time
    Union Pacific agreed to reinstate him after he completed the program. In 2006 he completed
    treatment and sought reinstatement, but the company balked. In 2009 Smith filed a charge
    of discrimination with the EEOC, alleging disability discrimination due to alcoholism. See
    
    42 U.S.C. §§ 12102
    (1), 12114(c)(4). He received a right-to-sue letter and sued the company
    under the ADA.
    After Union Pacific moved to dismiss the complaint under Federal Rule of Civil
    Procedure 12(b)(6) and invoked the affirmative defense that Smith’s charge was untimely,
    Smith filed a response brief supported by an affidavit. In his brief, Smith altered his
    narrative and contended that the discovery rule extended the limitations period and
    rendered his charge timely; he asserted that he did not discover until 2009 that the company
    had deceived him by refusing to honor its 2006 agreement to return him to service after he
    completed an additional treatment program. He also asserted an estoppel argument,
    contending that Union Pacific required him to remain in treatment, while concealing
    medical reports from him which revealed that additional treatment was unnecessary. Smith
    asked the district court to deny the company’s motion to dismiss or, in the alternative, to
    grant leave to amend.
    The district court granted Union Pacific’s motion to dismiss with prejudice. The
    court found Smith’s charge of discrimination untimely because his complaint and affidavit
    plainly reveal that he knew of the refusal to reinstate in 2006 and did not file his charge until
    2009–well after the 300-day deadline for filing a charge. See 
    42 U.S.C. § 12117
    (a). The court
    rejected Smith’s discovery-rule argument, identifying the beginning of the filing period as
    2006–the time that Smith alleged in his complaint that he became aware of the refusal to
    reinstate. The court also rejected Smith’s equitable-estoppel argument on grounds that
    Smith had not pleaded that the company attempted to deceive him. The court did not
    address the altered narrative that Smith advanced in his response brief.
    On appeal Smith first challenges the district court’s ruling that his charge of
    discrimination was untimely. Under the discovery rule, he argues, the charge he filed in
    2009 was timely because not until that year did he discover that the company had reneged
    on its agreement in 2006 to reinstate him; in the intervening period, he asserts, the company
    strung him along with false assurances of reinstatement.
    No. 11-2750                                                                               Page 2
    We construe the allegations in the complaint in the light most favorable to Smith. See
    Golden v. Helen Sigman & Assocs., Ltd., 
    611 F.3d 356
    , 360 (7th Cir. 2010). Smith alleged that in
    1998 he began working for Union Pacific as an engineer. A year later he underwent
    treatment for alcoholism and later returned to service. He voluntarily enrolled in an
    outpatient treatment program at Rush Behavioral Health Center in 2005, at which time
    Union Pacific agreed to reinstate him after he completed the program. In 2006 he completed
    treatment and sought reinstatement, but the company balked. In 2009 Smith filed a charge
    of discrimination with the EEOC, alleging disability discrimination due to alcoholism. See
    
    42 U.S.C. §§ 12102
    (1), 12114(c)(4). He received a right-to-sue letter and sued the company
    under the ADA.
    After Union Pacific moved to dismiss the complaint under Federal Rule of Civil
    Procedure 12(b)(6) and invoked the affirmative defense that Smith’s charge was untimely,
    Smith filed a response brief supported by an affidavit. In his brief, Smith altered his
    narrative and contended that the discovery rule extended the limitations period and
    rendered his charge timely; he asserted that he did not discover until 2009 that the company
    had deceived him by refusing to honor its 2006 agreement to return him to service after he
    completed an additional treatment program. He also asserted an estoppel argument,
    contending that Union Pacific required him to remain in treatment, while concealing
    medical reports from him which revealed that additional treatment was unnecessary. Smith
    asked the district court to deny the company’s motion to dismiss or, in the alternative, to
    grant leave to amend.
    The district court granted Union Pacific’s motion to dismiss with prejudice. The
    court found Smith’s charge of discrimination untimely because his complaint and affidavit
    plainly reveal that he knew of the refusal to reinstate in 2006 and did not file his charge until
    2009–well after the 300-day deadline for filing a charge. See 
    42 U.S.C. § 12117
    (a). The court
    rejected Smith’s discovery-rule argument, identifying the beginning of the filing period as
    2006–the time that Smith alleged in his complaint that he became aware of the refusal to
    reinstate. The court also rejected Smith’s equitable-estoppel argument on grounds that
    Smith had not pleaded that the company attempted to deceive him. The court did not
    address the altered narrative that Smith advanced in his response brief.
    On appeal Smith first challenges the district court’s ruling that his charge of
    discrimination was untimely. Under the discovery rule, he argues, the charge he filed in
    2009 was timely because not until that year did he discover that the company had reneged
    on its agreement in 2006 to reinstate him; in the intervening period, he asserts, the company
    strung him along with false assurances of reinstatement.
    No. 11-2750                                                                               Page 2
    We construe the allegations in the complaint in the light most favorable to Smith. See
    Golden v. Helen Sigman & Assocs., Ltd., 
    611 F.3d 356
    , 360 (7th Cir. 2010). Smith alleged that in
    1998 he began working for Union Pacific as an engineer. A year later he underwent
    treatment for alcoholism and later returned to service. He voluntarily enrolled in an
    outpatient treatment program at Rush Behavioral Health Center in 2005, at which time
    Union Pacific agreed to reinstate him after he completed the program. In 2006 he completed
    treatment and sought reinstatement, but the company balked. In 2009 Smith filed a charge
    of discrimination with the EEOC, alleging disability discrimination due to alcoholism. See
    
    42 U.S.C. §§ 12102
    (1), 12114(c)(4). He received a right-to-sue letter and sued the company
    under the ADA.
    After Union Pacific moved to dismiss the complaint under Federal Rule of Civil
    Procedure 12(b)(6) and invoked the affirmative defense that Smith’s charge was untimely,
    Smith filed a response brief supported by an affidavit. In his brief, Smith altered his
    narrative and contended that the discovery rule extended the limitations period and
    rendered his charge timely; he asserted that he did not discover until 2009 that the company
    had deceived him by refusing to honor its 2006 agreement to return him to service after he
    completed an additional treatment program. He also asserted an estoppel argument,
    contending that Union Pacific required him to remain in treatment, while concealing
    medical reports from him which revealed that additional treatment was unnecessary. Smith
    asked the district court to deny the company’s motion to dismiss or, in the alternative, to
    grant leave to amend.
    The district court granted Union Pacific’s motion to dismiss with prejudice. The
    court found Smith’s charge of discrimination untimely because his complaint and affidavit
    plainly reveal that he knew of the refusal to reinstate in 2006 and did not file his charge until
    2009–well after the 300-day deadline for filing a charge. See 
    42 U.S.C. § 12117
    (a). The court
    rejected Smith’s discovery-rule argument, identifying the beginning of the filing period as
    2006–the time that Smith alleged in his complaint that he became aware of the refusal to
    reinstate. The court also rejected Smith’s equitable-estoppel argument on grounds that
    Smith had not pleaded that the company attempted to deceive him. The court did not
    address the altered narrative that Smith advanced in his response brief.
    On appeal Smith first challenges the district court’s ruling that his charge of
    discrimination was untimely. Under the discovery rule, he argues, the charge he filed in
    2009 was timely because not until that year did he discover that the company had reneged
    on its agreement in 2006 to reinstate him; in the intervening period, he asserts, the company
    strung him along with false assurances of reinstatement.
    No. 11-2750                                                                               Page 2
    We construe the allegations in the complaint in the light most favorable to Smith. See
    Golden v. Helen Sigman & Assocs., Ltd., 
    611 F.3d 356
    , 360 (7th Cir. 2010). Smith alleged that in
    1998 he began working for Union Pacific as an engineer. A year later he underwent
    treatment for alcoholism and later returned to service. He voluntarily enrolled in an
    outpatient treatment program at Rush Behavioral Health Center in 2005, at which time
    Union Pacific agreed to reinstate him after he completed the program. In 2006 he completed
    treatment and sought reinstatement, but the company balked. In 2009 Smith filed a charge
    of discrimination with the EEOC, alleging disability discrimination due to alcoholism. See
    
    42 U.S.C. §§ 12102
    (1), 12114(c)(4). He received a right-to-sue letter and sued the company
    under the ADA.
    After Union Pacific moved to dismiss the complaint under Federal Rule of Civil
    Procedure 12(b)(6) and invoked the affirmative defense that Smith’s charge was untimely,
    Smith filed a response brief supported by an affidavit. In his brief, Smith altered his
    narrative and contended that the discovery rule extended the limitations period and
    rendered his charge timely; he asserted that he did not discover until 2009 that the company
    had deceived him by refusing to honor its 2006 agreement to return him to service after he
    completed an additional treatment program. He also asserted an estoppel argument,
    contending that Union Pacific required him to remain in treatment, while concealing
    medical reports from him which revealed that additional treatment was unnecessary. Smith
    asked the district court to deny the company’s motion to dismiss or, in the alternative, to
    grant leave to amend.
    The district court granted Union Pacific’s motion to dismiss with prejudice. The
    court found Smith’s charge of discrimination untimely because his complaint and affidavit
    plainly reveal that he knew of the refusal to reinstate in 2006 and did not file his charge until
    2009–well after the 300-day deadline for filing a charge. See 
    42 U.S.C. § 12117
    (a). The court
    rejected Smith’s discovery-rule argument, identifying the beginning of the filing period as
    2006–the time that Smith alleged in his complaint that he became aware of the refusal to
    reinstate. The court also rejected Smith’s equitable-estoppel argument on grounds that
    Smith had not pleaded that the company attempted to deceive him. The court did not
    address the altered narrative that Smith advanced in his response brief.
    On appeal Smith first challenges the district court’s ruling that his charge of
    discrimination was untimely. Under the discovery rule, he argues, the charge he filed in
    2009 was timely because not until that year did he discover that the company had reneged
    on its agreement in 2006 to reinstate him; in the intervening period, he asserts, the company
    strung him along with false assurances of reinstatement.
    No. 11-2750                                                                               Page 2
    We construe the allegations in the complaint in the light most favorable to Smith. See
    Golden v. Helen Sigman & Assocs., Ltd., 
    611 F.3d 356
    , 360 (7th Cir. 2010). Smith alleged that in
    1998 he began working for Union Pacific as an engineer. A year later he underwent
    treatment for alcoholism and later returned to service. He voluntarily enrolled in an
    outpatient treatment program at Rush Behavioral Health Center in 2005, at which time
    Union Pacific agreed to reinstate him after he completed the program. In 2006 he completed
    treatment and sought reinstatement, but the company balked. In 2009 Smith filed a charge
    of discrimination with the EEOC, alleging disability discrimination due to alcoholism. See
    
    42 U.S.C. §§ 12102
    (1), 12114(c)(4). He received a right-to-sue letter and sued the company
    under the ADA.
    After Union Pacific moved to dismiss the complaint under Federal Rule of Civil
    Procedure 12(b)(6) and invoked the affirmative defense that Smith’s charge was untimely,
    Smith filed a response brief supported by an affidavit. In his brief, Smith altered his
    narrative and contended that the discovery rule extended the limitations period and
    rendered his charge timely; he asserted that he did not discover until 2009 that the company
    had deceived him by refusing to honor its 2006 agreement to return him to service after he
    completed an additional treatment program. He also asserted an estoppel argument,
    contending that Union Pacific required him to remain in treatment, while concealing
    medical reports from him which revealed that additional treatment was unnecessary. Smith
    asked the district court to deny the company’s motion to dismiss or, in the alternative, to
    grant leave to amend.
    The district court granted Union Pacific’s motion to dismiss with prejudice. The
    court found Smith’s charge of discrimination untimely because his complaint and affidavit
    plainly reveal that he knew of the refusal to reinstate in 2006 and did not file his charge until
    2009–well after the 300-day deadline for filing a charge. See 
    42 U.S.C. § 12117
    (a). The court
    rejected Smith’s discovery-rule argument, identifying the beginning of the filing period as
    2006–the time that Smith alleged in his complaint that he became aware of the refusal to
    reinstate. The court also rejected Smith’s equitable-estoppel argument on grounds that
    Smith had not pleaded that the company attempted to deceive him. The court did not
    address the altered narrative that Smith advanced in his response brief.
    On appeal Smith first challenges the district court’s ruling that his charge of
    discrimination was untimely. Under the discovery rule, he argues, the charge he filed in
    2009 was timely because not until that year did he discover that the company had reneged
    on its agreement in 2006 to reinstate him; in the intervening period, he asserts, the company
    strung him along with false assurances of reinstatement.
    No. 11-2750                                                                               Page 2
    We construe the allegations in the complaint in the light most favorable to Smith. See
    Golden v. Helen Sigman & Assocs., Ltd., 
    611 F.3d 356
    , 360 (7th Cir. 2010). Smith alleged that in
    1998 he began working for Union Pacific as an engineer. A year later he underwent
    treatment for alcoholism and later returned to service. He voluntarily enrolled in an
    outpatient treatment program at Rush Behavioral Health Center in 2005, at which time
    Union Pacific agreed to reinstate him after he completed the program. In 2006 he completed
    treatment and sought reinstatement, but the company balked. In 2009 Smith filed a charge
    of discrimination with the EEOC, alleging disability discrimination due to alcoholism. See
    
    42 U.S.C. §§ 12102
    (1), 12114(c)(4). He received a right-to-sue letter and sued the company
    under the ADA.
    After Union Pacific moved to dismiss the complaint under Federal Rule of Civil
    Procedure 12(b)(6) and invoked the affirmative defense that Smith’s charge was untimely,
    Smith filed a response brief supported by an affidavit. In his brief, Smith altered his
    narrative and contended that the discovery rule extended the limitations period and
    rendered his charge timely; he asserted that he did not discover until 2009 that the company
    had deceived him by refusing to honor its 2006 agreement to return him to service after he
    completed an additional treatment program. He also asserted an estoppel argument,
    contending that Union Pacific required him to remain in treatment, while concealing
    medical reports from him which revealed that additional treatment was unnecessary. Smith
    asked the district court to deny the company’s motion to dismiss or, in the alternative, to
    grant leave to amend.
    The district court granted Union Pacific’s motion to dismiss with prejudice. The
    court found Smith’s charge of discrimination untimely because his complaint and affidavit
    plainly reveal that he knew of the refusal to reinstate in 2006 and did not file his charge until
    2009–well after the 300-day deadline for filing a charge. See 
    42 U.S.C. § 12117
    (a). The court
    rejected Smith’s discovery-rule argument, identifying the beginning of the filing period as
    2006–the time that Smith alleged in his complaint that he became aware of the refusal to
    reinstate. The court also rejected Smith’s equitable-estoppel argument on grounds that
    Smith had not pleaded that the company attempted to deceive him. The court did not
    address the altered narrative that Smith advanced in his response brief.
    On appeal Smith first challenges the district court’s ruling that his charge of
    discrimination was untimely. Under the discovery rule, he argues, the charge he filed in
    2009 was timely because not until that year did he discover that the company had reneged
    on its agreement in 2006 to reinstate him; in the intervening period, he asserts, the company
    strung him along with false assurances of reinstatement.
    No. 11-2750                                                                               Page 2
    We construe the allegations in the complaint in the light most favorable to Smith. See
    Golden v. Helen Sigman & Assocs., Ltd., 
    611 F.3d 356
    , 360 (7th Cir. 2010). Smith alleged that in
    1998 he began working for Union Pacific as an engineer. A year later he underwent
    treatment for alcoholism and later returned to service. He voluntarily enrolled in an
    outpatient treatment program at Rush Behavioral Health Center in 2005, at which time
    Union Pacific agreed to reinstate him after he completed the program. In 2006 he completed
    treatment and sought reinstatement, but the company balked. In 2009 Smith filed a charge
    of discrimination with the EEOC, alleging disability discrimination due to alcoholism. See
    
    42 U.S.C. §§ 12102
    (1), 12114(c)(4). He received a right-to-sue letter and sued the company
    under the ADA.
    After Union Pacific moved to dismiss the complaint under Federal Rule of Civil
    Procedure 12(b)(6) and invoked the affirmative defense that Smith’s charge was untimely,
    Smith filed a response brief supported by an affidavit. In his brief, Smith altered his
    narrative and contended that the discovery rule extended the limitations period and
    rendered his charge timely; he asserted that he did not discover until 2009 that the company
    had deceived him by refusing to honor its 2006 agreement to return him to service after he
    completed an additional treatment program. He also asserted an estoppel argument,
    contending that Union Pacific required him to remain in treatment, while concealing
    medical reports from him which revealed that additional treatment was unnecessary. Smith
    asked the district court to deny the company’s motion to dismiss or, in the alternative, to
    grant leave to amend.
    The district court granted Union Pacific’s motion to dismiss with prejudice. The
    court found Smith’s charge of discrimination untimely because his complaint and affidavit
    plainly reveal that he knew of the refusal to reinstate in 2006 and did not file his charge until
    2009–well after the 300-day deadline for filing a charge. See 
    42 U.S.C. § 12117
    (a). The court
    rejected Smith’s discovery-rule argument, identifying the beginning of the filing period as
    2006–the time that Smith alleged in his complaint that he became aware of the refusal to
    reinstate. The court also rejected Smith’s equitable-estoppel argument on grounds that
    Smith had not pleaded that the company attempted to deceive him. The court did not
    address the altered narrative that Smith advanced in his response brief.
    On appeal Smith first challenges the district court’s ruling that his charge of
    discrimination was untimely. Under the discovery rule, he argues, the charge he filed in
    2009 was timely because not until that year did he discover that the company had reneged
    on its agreement in 2006 to reinstate him; in the intervening period, he asserts, the company
    strung him along with false assurances of reinstatement.
    No. 11-2750                                                                               Page 2
    We construe the allegations in the complaint in the light most favorable to Smith. See
    Golden v. Helen Sigman & Assocs., Ltd., 
    611 F.3d 356
    , 360 (7th Cir. 2010). Smith alleged that in
    1998 he began working for Union Pacific as an engineer. A year later he underwent
    treatment for alcoholism and later returned to service. He voluntarily enrolled in an
    outpatient treatment program at Rush Behavioral Health Center in 2005, at which time
    Union Pacific agreed to reinstate him after he completed the program. In 2006 he completed
    treatment and sought reinstatement, but the company balked. In 2009 Smith filed a charge
    of discrimination with the EEOC, alleging disability discrimination due to alcoholism. See
    
    42 U.S.C. §§ 12102
    (1), 12114(c)(4). He received a right-to-sue letter and sued the company
    under the ADA.
    After Union Pacific moved to dismiss the complaint under Federal Rule of Civil
    Procedure 12(b)(6) and invoked the affirmative defense that Smith’s charge was untimely,
    Smith filed a response brief supported by an affidavit. In his brief, Smith altered his
    narrative and contended that the discovery rule extended the limitations period and
    rendered his charge timely; he asserted that he did not discover until 2009 that the company
    had deceived him by refusing to honor its 2006 agreement to return him to service after he
    completed an additional treatment program. He also asserted an estoppel argument,
    contending that Union Pacific required him to remain in treatment, while concealing
    medical reports from him which revealed that additional treatment was unnecessary. Smith
    asked the district court to deny the company’s motion to dismiss or, in the alternative, to
    grant leave to amend.
    The district court granted Union Pacific’s motion to dismiss with prejudice. The
    court found Smith’s charge of discrimination untimely because his complaint and affidavit
    plainly reveal that he knew of the refusal to reinstate in 2006 and did not file his charge until
    2009–well after the 300-day deadline for filing a charge. See 
    42 U.S.C. § 12117
    (a). The court
    rejected Smith’s discovery-rule argument, identifying the beginning of the filing period as
    2006–the time that Smith alleged in his complaint that he became aware of the refusal to
    reinstate. The court also rejected Smith’s equitable-estoppel argument on grounds that
    Smith had not pleaded that the company attempted to deceive him. The court did not
    address the altered narrative that Smith advanced in his response brief.
    On appeal Smith first challenges the district court’s ruling that his charge of
    discrimination was untimely. Under the discovery rule, he argues, the charge he filed in
    2009 was timely because not until that year did he discover that the company had reneged
    on its agreement in 2006 to reinstate him; in the intervening period, he asserts, the company
    strung him along with false assurances of reinstatement.
    No. 11-2750                                                                               Page 2
    We construe the allegations in the complaint in the light most favorable to Smith. See
    Golden v. Helen Sigman & Assocs., Ltd., 
    611 F.3d 356
    , 360 (7th Cir. 2010). Smith alleged that in
    1998 he began working for Union Pacific as an engineer. A year later he underwent
    treatment for alcoholism and later returned to service. He voluntarily enrolled in an
    outpatient treatment program at Rush Behavioral Health Center in 2005, at which time
    Union Pacific agreed to reinstate him after he completed the program. In 2006 he completed
    treatment and sought reinstatement, but the company balked. In 2009 Smith filed a charge
    of discrimination with the EEOC, alleging disability discrimination due to alcoholism. See
    
    42 U.S.C. §§ 12102
    (1), 12114(c)(4). He received a right-to-sue letter and sued the company
    under the ADA.
    After Union Pacific moved to dismiss the complaint under Federal Rule of Civil
    Procedure 12(b)(6) and invoked the affirmative defense that Smith’s charge was untimely,
    Smith filed a response brief supported by an affidavit. In his brief, Smith altered his
    narrative and contended that the discovery rule extended the limitations period and
    rendered his charge timely; he asserted that he did not discover until 2009 that the company
    had deceived him by refusing to honor its 2006 agreement to return him to service after he
    completed an additional treatment program. He also asserted an estoppel argument,
    contending that Union Pacific required him to remain in treatment, while concealing
    medical reports from him which revealed that additional treatment was unnecessary. Smith
    asked the district court to deny the company’s motion to dismiss or, in the alternative, to
    grant leave to amend.
    The district court granted Union Pacific’s motion to dismiss with prejudice. The
    court found Smith’s charge of discrimination untimely because his complaint and affidavit
    plainly reveal that he knew of the refusal to reinstate in 2006 and did not file his charge until
    2009–well after the 300-day deadline for filing a charge. See 
    42 U.S.C. § 12117
    (a). The court
    rejected Smith’s discovery-rule argument, identifying the beginning of the filing period as
    2006–the time that Smith alleged in his complaint that he became aware of the refusal to
    reinstate. The court also rejected Smith’s equitable-estoppel argument on grounds that
    Smith had not pleaded that the company attempted to deceive him. The court did not
    address the altered narrative that Smith advanced in his response brief.
    On appeal Smith first challenges the district court’s ruling that his charge of
    discrimination was untimely. Under the discovery rule, he argues, the charge he filed in
    2009 was timely because not until that year did he discover that the company had reneged
    on its agreement in 2006 to reinstate him; in the intervening period, he asserts, the company
    strung him along with false assurances of reinstatement.
    No. 11-2750                                                                               Page 2
    We construe the allegations in the complaint in the light most favorable to Smith. See
    Golden v. Helen Sigman & Assocs., Ltd., 
    611 F.3d 356
    , 360 (7th Cir. 2010). Smith alleged that in
    1998 he began working for Union Pacific as an engineer. A year later he underwent
    treatment for alcoholism and later returned to service. He voluntarily enrolled in an
    outpatient treatment program at Rush Behavioral Health Center in 2005, at which time
    Union Pacific agreed to reinstate him after he completed the program. In 2006 he completed
    treatment and sought reinstatement, but the company balked. In 2009 Smith filed a charge
    of discrimination with the EEOC, alleging disability discrimination due to alcoholism. See
    
    42 U.S.C. §§ 12102
    (1), 12114(c)(4). He received a right-to-sue letter and sued the company
    under the ADA.
    After Union Pacific moved to dismiss the complaint under Federal Rule of Civil
    Procedure 12(b)(6) and invoked the affirmative defense that Smith’s charge was untimely,
    Smith filed a response brief supported by an affidavit. In his brief, Smith altered his
    narrative and contended that the discovery rule extended the limitations period and
    rendered his charge timely; he asserted that he did not discover until 2009 that the company
    had deceived him by refusing to honor its 2006 agreement to return him to service after he
    completed an additional treatment program. He also asserted an estoppel argument,
    contending that Union Pacific required him to remain in treatment, while concealing
    medical reports from him which revealed that additional treatment was unnecessary. Smith
    asked the district court to deny the company’s motion to dismiss or, in the alternative, to
    grant leave to amend.
    The district court granted Union Pacific’s motion to dismiss with prejudice. The
    court found Smith’s charge of discrimination untimely because his complaint and affidavit
    plainly reveal that he knew of the refusal to reinstate in 2006 and did not file his charge until
    2009–well after the 300-day deadline for filing a charge. See 
    42 U.S.C. § 12117
    (a). The court
    rejected Smith’s discovery-rule argument, identifying the beginning of the filing period as
    2006–the time that Smith alleged in his complaint that he became aware of the refusal to
    reinstate. The court also rejected Smith’s equitable-estoppel argument on grounds that
    Smith had not pleaded that the company attempted to deceive him. The court did not
    address the altered narrative that Smith advanced in his response brief.
    On appeal Smith first challenges the district court’s ruling that his charge of
    discrimination was untimely. Under the discovery rule, he argues, the charge he filed in
    2009 was timely because not until that year did he discover that the company had reneged
    on its agreement in 2006 to reinstate him; in the intervening period, he asserts, the company
    strung him along with false assurances of reinstatement.
    No. 11-2750                                                                               Page 2
    We construe the allegations in the complaint in the light most favorable to Smith. See
    Golden v. Helen Sigman & Assocs., Ltd., 
    611 F.3d 356
    , 360 (7th Cir. 2010). Smith alleged that in
    1998 he began working for Union Pacific as an engineer. A year later he underwent
    treatment for alcoholism and later returned to service. He voluntarily enrolled in an
    outpatient treatment program at Rush Behavioral Health Center in 2005, at which time
    Union Pacific agreed to reinstate him after he completed the program. In 2006 he completed
    treatment and sought reinstatement, but the company balked. In 2009 Smith filed a charge
    of discrimination with the EEOC, alleging disability discrimination due to alcoholism. See
    
    42 U.S.C. §§ 12102
    (1), 12114(c)(4). He received a right-to-sue letter and sued the company
    under the ADA.
    After Union Pacific moved to dismiss the complaint under Federal Rule of Civil
    Procedure 12(b)(6) and invoked the affirmative defense that Smith’s charge was untimely,
    Smith filed a response brief supported by an affidavit. In his brief, Smith altered his
    narrative and contended that the discovery rule extended the limitations period and
    rendered his charge timely; he asserted that he did not discover until 2009 that the company
    had deceived him by refusing to honor its 2006 agreement to return him to service after he
    completed an additional treatment program. He also asserted an estoppel argument,
    contending that Union Pacific required him to remain in treatment, while concealing
    medical reports from him which revealed that additional treatment was unnecessary. Smith
    asked the district court to deny the company’s motion to dismiss or, in the alternative, to
    grant leave to amend.
    The district court granted Union Pacific’s motion to dismiss with prejudice. The
    court found Smith’s charge of discrimination untimely because his complaint and affidavit
    plainly reveal that he knew of the refusal to reinstate in 2006 and did not file his charge until
    2009–well after the 300-day deadline for filing a charge. See 
    42 U.S.C. § 12117
    (a). The court
    rejected Smith’s discovery-rule argument, identifying the beginning of the filing period as
    2006–the time that Smith alleged in his complaint that he became aware of the refusal to
    reinstate. The court also rejected Smith’s equitable-estoppel argument on grounds that
    Smith had not pleaded that the company attempted to deceive him. The court did not
    address the altered narrative that Smith advanced in his response brief.
    On appeal Smith first challenges the district court’s ruling that his charge of
    discrimination was untimely. Under the discovery rule, he argues, the charge he filed in
    2009 was timely because not until that year did he discover that the company had reneged
    on its agreement in 2006 to reinstate him; in the intervening period, he asserts, the company
    strung him along with false assurances of reinstatement.
    No. 11-2750                                                                               Page 2
    We construe the allegations in the complaint in the light most favorable to Smith. See
    Golden v. Helen Sigman & Assocs., Ltd., 
    611 F.3d 356
    , 360 (7th Cir. 2010). Smith alleged that in
    1998 he began working for Union Pacific as an engineer. A year later he underwent
    treatment for alcoholism and later returned to service. He voluntarily enrolled in an
    outpatient treatment program at Rush Behavioral Health Center in 2005, at which time
    Union Pacific agreed to reinstate him after he completed the program. In 2006 he completed
    treatment and sought reinstatement, but the company balked. In 2009 Smith filed a charge
    of discrimination with the EEOC, alleging disability discrimination due to alcoholism. See
    
    42 U.S.C. §§ 12102
    (1), 12114(c)(4). He received a right-to-sue letter and sued the company
    under the ADA.
    After Union Pacific moved to dismiss the complaint under Federal Rule of Civil
    Procedure 12(b)(6) and invoked the affirmative defense that Smith’s charge was untimely,
    Smith filed a response brief supported by an affidavit. In his brief, Smith altered his
    narrative and contended that the discovery rule extended the limitations period and
    rendered his charge timely; he asserted that he did not discover until 2009 that the company
    had deceived him by refusing to honor its 2006 agreement to return him to service after he
    completed an additional treatment program. He also asserted an estoppel argument,
    contending that Union Pacific required him to remain in treatment, while concealing
    medical reports from him which revealed that additional treatment was unnecessary. Smith
    asked the district court to deny the company’s motion to dismiss or, in the alternative, to
    grant leave to amend.
    The district court granted Union Pacific’s motion to dismiss with prejudice. The
    court found Smith’s charge of discrimination untimely because his complaint and affidavit
    plainly reveal that he knew of the refusal to reinstate in 2006 and did not file his charge until
    2009–well after the 300-day deadline for filing a charge. See 
    42 U.S.C. § 12117
    (a). The court
    rejected Smith’s discovery-rule argument, identifying the beginning of the filing period as
    2006–the time that Smith alleged in his complaint that he became aware of the refusal to
    reinstate. The court also rejected Smith’s equitable-estoppel argument on grounds that
    Smith had not pleaded that the company attempted to deceive him. The court did not
    address the altered narrative that Smith advanced in his response brief.
    On appeal Smith first challenges the district court’s ruling that his charge of
    discrimination was untimely. Under the discovery rule, he argues, the charge he filed in
    2009 was timely because not until that year did he discover that the company had reneged
    on its agreement in 2006 to reinstate him; in the intervening period, he asserts, the company
    strung him along with false assurances of reinstatement.
    No. 11-2750                                                                               Page 2
    We construe the allegations in the complaint in the light most favorable to Smith. See
    Golden v. Helen Sigman & Assocs., Ltd., 
    611 F.3d 356
    , 360 (7th Cir. 2010). Smith alleged that in
    1998 he began working for Union Pacific as an engineer. A year later he underwent
    treatment for alcoholism and later returned to service. He voluntarily enrolled in an
    outpatient treatment program at Rush Behavioral Health Center in 2005, at which time
    Union Pacific agreed to reinstate him after he completed the program. In 2006 he completed
    treatment and sought reinstatement, but the company balked. In 2009 Smith filed a charge
    of discrimination with the EEOC, alleging disability discrimination due to alcoholism. See
    
    42 U.S.C. §§ 12102
    (1), 12114(c)(4). He received a right-to-sue letter and sued the company
    under the ADA.
    After Union Pacific moved to dismiss the complaint under Federal Rule of Civil
    Procedure 12(b)(6) and invoked the affirmative defense that Smith’s charge was untimely,
    Smith filed a response brief supported by an affidavit. In his brief, Smith altered his
    narrative and contended that the discovery rule extended the limitations period and
    rendered his charge timely; he asserted that he did not discover until 2009 that the company
    had deceived him by refusing to honor its 2006 agreement to return him to service after he
    completed an additional treatment program. He also asserted an estoppel argument,
    contending that Union Pacific required him to remain in treatment, while concealing
    medical reports from him which revealed that additional treatment was unnecessary. Smith
    asked the district court to deny the company’s motion to dismiss or, in the alternative, to
    grant leave to amend.
    The district court granted Union Pacific’s motion to dismiss with prejudice. The
    court found Smith’s charge of discrimination untimely because his complaint and affidavit
    plainly reveal that he knew of the refusal to reinstate in 2006 and did not file his charge until
    2009–well after the 300-day deadline for filing a charge. See 
    42 U.S.C. § 12117
    (a). The court
    rejected Smith’s discovery-rule argument, identifying the beginning of the filing period as
    2006–the time that Smith alleged in his complaint that he became aware of the refusal to
    reinstate. The court also rejected Smith’s equitable-estoppel argument on grounds that
    Smith had not pleaded that the company attempted to deceive him. The court did not
    address the altered narrative that Smith advanced in his response brief.
    On appeal Smith first challenges the district court’s ruling that his charge of
    discrimination was untimely. Under the discovery rule, he argues, the charge he filed in
    2009 was timely because not until that year did he discover that the company had reneged
    on its agreement in 2006 to reinstate him; in the intervening period, he asserts, the company
    strung him along with false assurances of reinstatement.
    No. 11-2750                                                                               Page 2
    We construe the allegations in the complaint in the light most favorable to Smith. See
    Golden v. Helen Sigman & Assocs., Ltd., 
    611 F.3d 356
    , 360 (7th Cir. 2010). Smith alleged that in
    1998 he began working for Union Pacific as an engineer. A year later he underwent
    treatment for alcoholism and later returned to service. He voluntarily enrolled in an
    outpatient treatment program at Rush Behavioral Health Center in 2005, at which time
    Union Pacific agreed to reinstate him after he completed the program. In 2006 he completed
    treatment and sought reinstatement, but the company balked. In 2009 Smith filed a charge
    of discrimination with the EEOC, alleging disability discrimination due to alcoholism. See
    
    42 U.S.C. §§ 12102
    (1), 12114(c)(4). He received a right-to-sue letter and sued the company
    under the ADA.
    After Union Pacific moved to dismiss the complaint under Federal Rule of Civil
    Procedure 12(b)(6) and invoked the affirmative defense that Smith’s charge was untimely,
    Smith filed a response brief supported by an affidavit. In his brief, Smith altered his
    narrative and contended that the discovery rule extended the limitations period and
    rendered his charge timely; he asserted that he did not discover until 2009 that the company
    had deceived him by refusing to honor its 2006 agreement to return him to service after he
    completed an additional treatment program. He also asserted an estoppel argument,
    contending that Union Pacific required him to remain in treatment, while concealing
    medical reports from him which revealed that additional treatment was unnecessary. Smith
    asked the district court to deny the company’s motion to dismiss or, in the alternative, to
    grant leave to amend.
    The district court granted Union Pacific’s motion to dismiss with prejudice. The
    court found Smith’s charge of discrimination untimely because his complaint and affidavit
    plainly reveal that he knew of the refusal to reinstate in 2006 and did not file his charge until
    2009–well after the 300-day deadline for filing a charge. See 
    42 U.S.C. § 12117
    (a). The court
    rejected Smith’s discovery-rule argument, identifying the beginning of the filing period as
    2006–the time that Smith alleged in his complaint that he became aware of the refusal to
    reinstate. The court also rejected Smith’s equitable-estoppel argument on grounds that
    Smith had not pleaded that the company attempted to deceive him. The court did not
    address the altered narrative that Smith advanced in his response brief.
    On appeal Smith first challenges the district court’s ruling that his charge of
    discrimination was untimely. Under the discovery rule, he argues, the charge he filed in
    2009 was timely because not until that year did he discover that the company had reneged
    on its agreement in 2006 to reinstate him; in the intervening period, he asserts, the company
    strung him along with false assurances of reinstatement.
    No. 11-2750                                                                               Page 2
    We construe the allegations in the complaint in the light most favorable to Smith. See
    Golden v. Helen Sigman & Assocs., Ltd., 
    611 F.3d 356
    , 360 (7th Cir. 2010). Smith alleged that in
    1998 he began working for Union Pacific as an engineer. A year later he underwent
    treatment for alcoholism and later returned to service. He voluntarily enrolled in an
    outpatient treatment program at Rush Behavioral Health Center in 2005, at which time
    Union Pacific agreed to reinstate him after he completed the program. In 2006 he completed
    treatment and sought reinstatement, but the company balked. In 2009 Smith filed a charge
    of discrimination with the EEOC, alleging disability discrimination due to alcoholism. See
    
    42 U.S.C. §§ 12102
    (1), 12114(c)(4). He received a right-to-sue letter and sued the company
    under the ADA.
    After Union Pacific moved to dismiss the complaint under Federal Rule of Civil
    Procedure 12(b)(6) and invoked the affirmative defense that Smith’s charge was untimely,
    Smith filed a response brief supported by an affidavit. In his brief, Smith altered his
    narrative and contended that the discovery rule extended the limitations period and
    rendered his charge timely; he asserted that he did not discover until 2009 that the company
    had deceived him by refusing to honor its 2006 agreement to return him to service after he
    completed an additional treatment program. He also asserted an estoppel argument,
    contending that Union Pacific required him to remain in treatment, while concealing
    medical reports from him which revealed that additional treatment was unnecessary. Smith
    asked the district court to deny the company’s motion to dismiss or, in the alternative, to
    grant leave to amend.
    The district court granted Union Pacific’s motion to dismiss with prejudice. The
    court found Smith’s charge of discrimination untimely because his complaint and affidavit
    plainly reveal that he knew of the refusal to reinstate in 2006 and did not file his charge until
    2009–well after the 300-day deadline for filing a charge. See 
    42 U.S.C. § 12117
    (a). The court
    rejected Smith’s discovery-rule argument, identifying the beginning of the filing period as
    2006–the time that Smith alleged in his complaint that he became aware of the refusal to
    reinstate. The court also rejected Smith’s equitable-estoppel argument on grounds that
    Smith had not pleaded that the company attempted to deceive him. The court did not
    address the altered narrative that Smith advanced in his response brief.
    On appeal Smith first challenges the district court’s ruling that his charge of
    discrimination was untimely. Under the discovery rule, he argues, the charge he filed in
    2009 was timely because not until that year did he discover that the company had reneged
    on its agreement in 2006 to reinstate him; in the intervening period, he asserts, the company
    strung him along with false assurances of reinstatement.
    No. 11-2750                                                                               Page 2
    We construe the allegations in the complaint in the light most favorable to Smith. See
    Golden v. Helen Sigman & Assocs., Ltd., 
    611 F.3d 356
    , 360 (7th Cir. 2010). Smith alleged that in
    1998 he began working for Union Pacific as an engineer. A year later he underwent
    treatment for alcoholism and later returned to service. He voluntarily enrolled in an
    outpatient treatment program at Rush Behavioral Health Center in 2005, at which time
    Union Pacific agreed to reinstate him after he completed the program. In 2006 he completed
    treatment and sought reinstatement, but the company balked. In 2009 Smith filed a charge
    of discrimination with the EEOC, alleging disability discrimination due to alcoholism. See
    
    42 U.S.C. §§ 12102
    (1), 12114(c)(4). He received a right-to-sue letter and sued the company
    under the ADA.
    After Union Pacific moved to dismiss the complaint under Federal Rule of Civil
    Procedure 12(b)(6) and invoked the affirmative defense that Smith’s charge was untimely,
    Smith filed a response brief supported by an affidavit. In his brief, Smith altered his
    narrative and contended that the discovery rule extended the limitations period and
    rendered his charge timely; he asserted that he did not discover until 2009 that the company
    had deceived him by refusing to honor its 2006 agreement to return him to service after he
    completed an additional treatment program. He also asserted an estoppel argument,
    contending that Union Pacific required him to remain in treatment, while concealing
    medical reports from him which revealed that additional treatment was unnecessary. Smith
    asked the district court to deny the company’s motion to dismiss or, in the alternative, to
    grant leave to amend.
    The district court granted Union Pacific’s motion to dismiss with prejudice. The
    court found Smith’s charge of discrimination untimely because his complaint and affidavit
    plainly reveal that he knew of the refusal to reinstate in 2006 and did not file his charge until
    2009–well after the 300-day deadline for filing a charge. See 
    42 U.S.C. § 12117
    (a). The court
    rejected Smith’s discovery-rule argument, identifying the beginning of the filing period as
    2006–the time that Smith alleged in his complaint that he became aware of the refusal to
    reinstate. The court also rejected Smith’s equitable-estoppel argument on grounds that
    Smith had not pleaded that the company attempted to deceive him. The court did not
    address the altered narrative that Smith advanced in his response brief.
    On appeal Smith first challenges the district court’s ruling that his charge of
    discrimination was untimely. Under the discovery rule, he argues, the charge he filed in
    2009 was timely because not until that year did he discover that the company had reneged
    on its agreement in 2006 to reinstate him; in the intervening period, he asserts, the company
    strung him along with false assurances of reinstatement.
    No. 11-2750                                                                               Page 2
    We construe the allegations in the complaint in the light most favorable to Smith. See
    Golden v. Helen Sigman & Assocs., Ltd., 
    611 F.3d 356
    , 360 (7th Cir. 2010). Smith alleged that in
    1998 he began working for Union Pacific as an engineer. A year later he underwent
    treatment for alcoholism and later returned to service. He voluntarily enrolled in an
    outpatient treatment program at Rush Behavioral Health Center in 2005, at which time
    Union Pacific agreed to reinstate him after he completed the program. In 2006 he completed
    treatment and sought reinstatement, but the company balked. In 2009 Smith filed a charge
    of discrimination with the EEOC, alleging disability discrimination due to alcoholism. See
    
    42 U.S.C. §§ 12102
    (1), 12114(c)(4). He received a right-to-sue letter and sued the company
    under the ADA.
    After Union Pacific moved to dismiss the complaint under Federal Rule of Civil
    Procedure 12(b)(6) and invoked the affirmative defense that Smith’s charge was untimely,
    Smith filed a response brief supported by an affidavit. In his brief, Smith altered his
    narrative and contended that the discovery rule extended the limitations period and
    rendered his charge timely; he asserted that he did not discover until 2009 that the company
    had deceived him by refusing to honor its 2006 agreement to return him to service after he
    completed an additional treatment program. He also asserted an estoppel argument,
    contending that Union Pacific required him to remain in treatment, while concealing
    medical reports from him which revealed that additional treatment was unnecessary. Smith
    asked the district court to deny the company’s motion to dismiss or, in the alternative, to
    grant leave to amend.
    The district court granted Union Pacific’s motion to dismiss with prejudice. The
    court found Smith’s charge of discrimination untimely because his complaint and affidavit
    plainly reveal that he knew of the refusal to reinstate in 2006 and did not file his charge until
    2009–well after the 300-day deadline for filing a charge. See 
    42 U.S.C. § 12117
    (a). The court
    rejected Smith’s discovery-rule argument, identifying the beginning of the filing period as
    2006–the time that Smith alleged in his complaint that he became aware of the refusal to
    reinstate. The court also rejected Smith’s equitable-estoppel argument on grounds that
    Smith had not pleaded that the company attempted to deceive him. The court did not
    address the altered narrative that Smith advanced in his response brief.
    On appeal Smith first challenges the district court’s ruling that his charge of
    discrimination was untimely. Under the discovery rule, he argues, the charge he filed in
    2009 was timely because not until that year did he discover that the company had reneged
    on its agreement in 2006 to reinstate him; in the intervening period, he asserts, the company
    strung him along with false assurances of reinstatement.
    No. 11-2750                                                                               Page 2
    We construe the allegations in the complaint in the light most favorable to Smith. See
    Golden v. Helen Sigman & Assocs., Ltd., 
    611 F.3d 356
    , 360 (7th Cir. 2010). Smith alleged that in
    1998 he began working for Union Pacific as an engineer. A year later he underwent
    treatment for alcoholism and later returned to service. He voluntarily enrolled in an
    outpatient treatment program at Rush Behavioral Health Center in 2005, at which time
    Union Pacific agreed to reinstate him after he completed the program. In 2006 he completed
    treatment and sought reinstatement, but the company balked. In 2009 Smith filed a charge
    of discrimination with the EEOC, alleging disability discrimination due to alcoholism. See
    
    42 U.S.C. §§ 12102
    (1), 12114(c)(4). He received a right-to-sue letter and sued the company
    under the ADA.
    After Union Pacific moved to dismiss the complaint under Federal Rule of Civil
    Procedure 12(b)(6) and invoked the affirmative defense that Smith’s charge was untimely,
    Smith filed a response brief supported by an affidavit. In his brief, Smith altered his
    narrative and contended that the discovery rule extended the limitations period and
    rendered his charge timely; he asserted that he did not discover until 2009 that the company
    had deceived him by refusing to honor its 2006 agreement to return him to service after he
    completed an additional treatment program. He also asserted an estoppel argument,
    contending that Union Pacific required him to remain in treatment, while concealing
    medical reports from him which revealed that additional treatment was unnecessary. Smith
    asked the district court to deny the company’s motion to dismiss or, in the alternative, to
    grant leave to amend.
    The district court granted Union Pacific’s motion to dismiss with prejudice. The
    court found Smith’s charge of discrimination untimely because his complaint and affidavit
    plainly reveal that he knew of the refusal to reinstate in 2006 and did not file his charge until
    2009–well after the 300-day deadline for filing a charge. See 
    42 U.S.C. § 12117
    (a). The court
    rejected Smith’s discovery-rule argument, identifying the beginning of the filing period as
    2006–the time that Smith alleged in his complaint that he became aware of the refusal to
    reinstate. The court also rejected Smith’s equitable-estoppel argument on grounds that
    Smith had not pleaded that the company attempted to deceive him. The court did not
    address the altered narrative that Smith advanced in his response brief.
    On appeal Smith first challenges the district court’s ruling that his charge of
    discrimination was untimely. Under the discovery rule, he argues, the charge he filed in
    2009 was timely because not until that year did he discover that the company had reneged
    on its agreement in 2006 to reinstate him; in the intervening period, he asserts, the company
    strung him along with false assurances of reinstatement.
    No. 11-2750                                                                               Page 2
    We construe the allegations in the complaint in the light most favorable to Smith. See
    Golden v. Helen Sigman & Assocs., Ltd., 
    611 F.3d 356
    , 360 (7th Cir. 2010). Smith alleged that in
    1998 he began working for Union Pacific as an engineer. A year later he underwent
    treatment for alcoholism and later returned to service. He voluntarily enrolled in an
    outpatient treatment program at Rush Behavioral Health Center in 2005, at which time
    Union Pacific agreed to reinstate him after he completed the program. In 2006 he completed
    treatment and sought reinstatement, but the company balked. In 2009 Smith filed a charge
    of discrimination with the EEOC, alleging disability discrimination due to alcoholism. See
    
    42 U.S.C. §§ 12102
    (1), 12114(c)(4). He received a right-to-sue letter and sued the company
    under the ADA.
    After Union Pacific moved to dismiss the complaint under Federal Rule of Civil
    Procedure 12(b)(6) and invoked the affirmative defense that Smith’s charge was untimely,
    Smith filed a response brief supported by an affidavit. In his brief, Smith altered his
    narrative and contended that the discovery rule extended the limitations period and
    rendered his charge timely; he asserted that he did not discover until 2009 that the company
    had deceived him by refusing to honor its 2006 agreement to return him to service after he
    completed an additional treatment program. He also asserted an estoppel argument,
    contending that Union Pacific required him to remain in treatment, while concealing
    medical reports from him which revealed that additional treatment was unnecessary. Smith
    asked the district court to deny the company’s motion to dismiss or, in the alternative, to
    grant leave to amend.
    The district court granted Union Pacific’s motion to dismiss with prejudice. The
    court found Smith’s charge of discrimination untimely because his complaint and affidavit
    plainly reveal that he knew of the refusal to reinstate in 2006 and did not file his charge until
    2009–well after the 300-day deadline for filing a charge. See 
    42 U.S.C. § 12117
    (a). The court
    rejected Smith’s discovery-rule argument, identifying the beginning of the filing period as
    2006–the time that Smith alleged in his complaint that he became aware of the refusal to
    reinstate. The court also rejected Smith’s equitable-estoppel argument on grounds that
    Smith had not pleaded that the company attempted to deceive him. The court did not
    address the altered narrative that Smith advanced in his response brief.
    On appeal Smith first challenges the district court’s ruling that his charge of
    discrimination was untimely. Under the discovery rule, he argues, the charge he filed in
    2009 was timely because not until that year did he discover that the company had reneged
    on its agreement in 2006 to reinstate him; in the intervening period, he asserts, the company
    strung him along with false assurances of reinstatement.
    No. 11-2750                                                                               Page 2
    We construe the allegations in the complaint in the light most favorable to Smith. See
    Golden v. Helen Sigman & Assocs., Ltd., 
    611 F.3d 356
    , 360 (7th Cir. 2010). Smith alleged that in
    1998 he began working for Union Pacific as an engineer. A year later he underwent
    treatment for alcoholism and later returned to service. He voluntarily enrolled in an
    outpatient treatment program at Rush Behavioral Health Center in 2005, at which time
    Union Pacific agreed to reinstate him after he completed the program. In 2006 he completed
    treatment and sought reinstatement, but the company balked. In 2009 Smith filed a charge
    of discrimination with the EEOC, alleging disability discrimination due to alcoholism. See
    
    42 U.S.C. §§ 12102
    (1), 12114(c)(4). He received a right-to-sue letter and sued the company
    under the ADA.
    After Union Pacific moved to dismiss the complaint under Federal Rule of Civil
    Procedure 12(b)(6) and invoked the affirmative defense that Smith’s charge was untimely,
    Smith filed a response brief supported by an affidavit. In his brief, Smith altered his
    narrative and contended that the discovery rule extended the limitations period and
    rendered his charge timely; he asserted that he did not discover until 2009 that the company
    had deceived him by refusing to honor its 2006 agreement to return him to service after he
    completed an additional treatment program. He also asserted an estoppel argument,
    contending that Union Pacific required him to remain in treatment, while concealing
    medical reports from him which revealed that additional treatment was unnecessary. Smith
    asked the district court to deny the company’s motion to dismiss or, in the alternative, to
    grant leave to amend.
    The district court granted Union Pacific’s motion to dismiss with prejudice. The
    court found Smith’s charge of discrimination untimely because his complaint and affidavit
    plainly reveal that he knew of the refusal to reinstate in 2006 and did not file his charge until
    2009–well after the 300-day deadline for filing a charge. See 
    42 U.S.C. § 12117
    (a). The court
    rejected Smith’s discovery-rule argument, identifying the beginning of the filing period as
    2006–the time that Smith alleged in his complaint that he became aware of the refusal to
    reinstate. The court also rejected Smith’s equitable-estoppel argument on grounds that
    Smith had not pleaded that the company attempted to deceive him. The court did not
    address the altered narrative that Smith advanced in his response brief.
    On appeal Smith first challenges the district court’s ruling that his charge of
    discrimination was untimely. Under the discovery rule, he argues, the charge he filed in
    2009 was timely because not until that year did he discover that the company had reneged
    on its agreement in 2006 to reinstate him; in the intervening period, he asserts, the company
    strung him along with false assurances of reinstatement.
    No. 11-2750                                                                               Page 2
    We construe the allegations in the complaint in the light most favorable to Smith. See
    Golden v. Helen Sigman & Assocs., Ltd., 
    611 F.3d 356
    , 360 (7th Cir. 2010). Smith alleged that in
    1998 he began working for Union Pacific as an engineer. A year later he underwent
    treatment for alcoholism and later returned to service. He voluntarily enrolled in an
    outpatient treatment program at Rush Behavioral Health Center in 2005, at which time
    Union Pacific agreed to reinstate him after he completed the program. In 2006 he completed
    treatment and sought reinstatement, but the company balked. In 2009 Smith filed a charge
    of discrimination with the EEOC, alleging disability discrimination due to alcoholism. See
    
    42 U.S.C. §§ 12102
    (1), 12114(c)(4). He received a right-to-sue letter and sued the company
    under the ADA.
    After Union Pacific moved to dismiss the complaint under Federal Rule of Civil
    Procedure 12(b)(6) and invoked the affirmative defense that Smith’s charge was untimely,
    Smith filed a response brief supported by an affidavit. In his brief, Smith altered his
    narrative and contended that the discovery rule extended the limitations period and
    rendered his charge timely; he asserted that he did not discover until 2009 that the company
    had deceived him by refusing to honor its 2006 agreement to return him to service after he
    completed an additional treatment program. He also asserted an estoppel argument,
    contending that Union Pacific required him to remain in treatment, while concealing
    medical reports from him which revealed that additional treatment was unnecessary. Smith
    asked the district court to deny the company’s motion to dismiss or, in the alternative, to
    grant leave to amend.
    The district court granted Union Pacific’s motion to dismiss with prejudice. The
    court found Smith’s charge of discrimination untimely because his complaint and affidavit
    plainly reveal that he knew of the refusal to reinstate in 2006 and did not file his charge until
    2009–well after the 300-day deadline for filing a charge. See 
    42 U.S.C. § 12117
    (a). The court
    rejected Smith’s discovery-rule argument, identifying the beginning of the filing period as
    2006–the time that Smith alleged in his complaint that he became aware of the refusal to
    reinstate. The court also rejected Smith’s equitable-estoppel argument on grounds that
    Smith had not pleaded that the company attempted to deceive him. The court did not
    address the altered narrative that Smith advanced in his response brief.
    On appeal Smith first challenges the district court’s ruling that his charge of
    discrimination was untimely. Under the discovery rule, he argues, the charge he filed in
    2009 was timely because not until that year did he discover that the company had reneged
    on its agreement in 2006 to reinstate him; in the intervening period, he asserts, the company
    strung him along with false assurances of reinstatement.
    No. 11-2750                                                                               Page 2
    We construe the allegations in the complaint in the light most favorable to Smith. See
    Golden v. Helen Sigman & Assocs., Ltd., 
    611 F.3d 356
    , 360 (7th Cir. 2010). Smith alleged that in
    1998 he began working for Union Pacific as an engineer. A year later he underwent
    treatment for alcoholism and later returned to service. He voluntarily enrolled in an
    outpatient treatment program at Rush Behavioral Health Center in 2005, at which time
    Union Pacific agreed to reinstate him after he completed the program. In 2006 he completed
    treatment and sought reinstatement, but the company balked. In 2009 Smith filed a charge
    of discrimination with the EEOC, alleging disability discrimination due to alcoholism. See
    
    42 U.S.C. §§ 12102
    (1), 12114(c)(4). He received a right-to-sue letter and sued the company
    under the ADA.
    After Union Pacific moved to dismiss the complaint under Federal Rule of Civil
    Procedure 12(b)(6) and invoked the affirmative defense that Smith’s charge was untimely,
    Smith filed a response brief supported by an affidavit. In his brief, Smith altered his
    narrative and contended that the discovery rule extended the limitations period and
    rendered his charge timely; he asserted that he did not discover until 2009 that the company
    had deceived him by refusing to honor its 2006 agreement to return him to service after he
    completed an additional treatment program. He also asserted an estoppel argument,
    contending that Union Pacific required him to remain in treatment, while concealing
    medical reports from him which revealed that additional treatment was unnecessary. Smith
    asked the district court to deny the company’s motion to dismiss or, in the alternative, to
    grant leave to amend.
    The district court granted Union Pacific’s motion to dismiss with prejudice. The
    court found Smith’s charge of discrimination untimely because his complaint and affidavit
    plainly reveal that he knew of the refusal to reinstate in 2006 and did not file his charge until
    2009–well after the 300-day deadline for filing a charge. See 
    42 U.S.C. § 12117
    (a). The court
    rejected Smith’s discovery-rule argument, identifying the beginning of the filing period as
    2006–the time that Smith alleged in his complaint that he became aware of the refusal to
    reinstate. The court also rejected Smith’s equitable-estoppel argument on grounds that
    Smith had not pleaded that the company attempted to deceive him. The court did not
    address the altered narrative that Smith advanced in his response brief.
    On appeal Smith first challenges the district court’s ruling that his charge of
    discrimination was untimely. Under the discovery rule, he argues, the charge he filed in
    2009 was timely because not until that year did he discover that the company had reneged
    on its agreement in 2006 to reinstate him; in the intervening period, he asserts, the company
    strung him along with false assurances of reinstatement.
    No. 11-2750                                                                                Page 3
    Before litigating an unlawful employment practice under the ADA, an employee
    must file a timely charge of discrimination with the EEOC. See 42 U.S.C. § 2000e-5(e)(1),
    incorporated by 
    42 U.S.C. § 12117
    (a); Stepney v. Naperville Sch. Dist. 203, 
    392 F.3d 236
    , 239 (7th
    Cir. 2004). A plaintiff must file a charge within 300 days “after the alleged unlawful
    employment practice occurred.” Chaudhry v. Nucor Steel-Indiana, 
    546 F.3d 832
     (7th Cir. 2008).
    The discovery rule postpones the beginning of the limitations period to the date when the
    plaintiff discovers or should have discovered that he has been injured. Barry Aviation Inc. v.
    Land O'Lakes Mun. Airport Com'n, 
    377 F.3d 682
    , 688-89 (7th Cir. 2004); Clark v. City of
    Braidwood, 
    318 F.3d 764
    , 767 (7th Cir. 2003).
    The district court correctly determined that the discovery rule did not excuse Smith’s
    untimelineness. As the court explained, the complaint says only that Smith discovered the
    refusal to reinstate in 2006 and did not file his charge until 2009, well after the 300-day filing
    period expired. See Chaudhry, 
    546 F.3d at 836
    . Given these allegations, the face of the
    complaint shows that the action is untimely. See United States v. Lewis, 
    411 F.3d 838
    , 842 (7th
    Cir. 2005). Although Smith advanced a new chronology in his response brief, the district
    court correctly disregarded that chronology because it differs from the account he pleaded,
    and he may not amend his complaint through the filing of a response brief. See Pirelli
    Armstrong Tire Corp. Retiree Med. Benefits Trust v. Walgreen Comp., 
    631 F.3d 436
    , 448 (7th Cir.
    2011); Help At Home Inc. v. Medical Capital, L.L.C., 
    260 F.3d 748
    , 752 (7th Cir. 2001).
    Smith next contends that district court erred in rejecting his argument that equitable
    estoppel extended the period during which he could file his charge. He contends that the
    company withheld medical records from him and required him to continue with treatment
    that the records revealed was unnecessary. Equitable estoppel suspends the running of the
    filing period when the defendant takes active steps to prevent the plaintiff from suing,
    Barry, 
    377 F.3d at 689
    , including concealing evidence needed to determine the viability of a
    claim. See 
    id. at 689
    ; Cada, 920 F.2d at 421. The district court, however, properly deemed
    equitable estoppel inapplicable because Smith did not plead that the company deceived
    him. Although Smith’s response brief offers such an account, the court correctly disregarded
    that new account because the response brief paints a narrative different than that alleged in
    his complaint. See Car Carriers, Inc. v. Ford Motor Co., 
    745 F.2d 1101
    , 1107 (7th Cir. 1984).
    Last Smith argues that, even if his complaint was deficient, the district court should
    have granted him leave to amend under Federal Rule of Civil Procedure 15. Rule 15
    ordinarily requires that leave to amend be granted at least once when there is a potentially
    curable problem with the complaint. See Bausch v. Stryker Corp., 
    630 F.3d 546
    , 562 (7th Cir.
    2010). In this regard, Smith contends that the factual assertions advanced in his response
    brief would trigger the discovery rule and establish equitable estoppel, curing the problem
    of untimeliness.
    No. 11-2750                                                                                Page 3
    Before litigating an unlawful employment practice under the ADA, an employee
    must file a timely charge of discrimination with the EEOC. See 42 U.S.C. § 2000e-5(e)(1),
    incorporated by 
    42 U.S.C. § 12117
    (a); Stepney v. Naperville Sch. Dist. 203, 
    392 F.3d 236
    , 239 (7th
    Cir. 2004). A plaintiff must file a charge within 300 days “after the alleged unlawful
    employment practice occurred.” Chaudhry v. Nucor Steel-Indiana, 
    546 F.3d 832
     (7th Cir. 2008).
    The discovery rule postpones the beginning of the limitations period to the date when the
    plaintiff discovers or should have discovered that he has been injured. Barry Aviation Inc. v.
    Land O'Lakes Mun. Airport Com'n, 
    377 F.3d 682
    , 688-89 (7th Cir. 2004); Clark v. City of
    Braidwood, 
    318 F.3d 764
    , 767 (7th Cir. 2003).
    The district court correctly determined that the discovery rule did not excuse Smith’s
    untimelineness. As the court explained, the complaint says only that Smith discovered the
    refusal to reinstate in 2006 and did not file his charge until 2009, well after the 300-day filing
    period expired. See Chaudhry, 
    546 F.3d at 836
    . Given these allegations, the face of the
    complaint shows that the action is untimely. See United States v. Lewis, 
    411 F.3d 838
    , 842 (7th
    Cir. 2005). Although Smith advanced a new chronology in his response brief, the district
    court correctly disregarded that chronology because it differs from the account he pleaded,
    and he may not amend his complaint through the filing of a response brief. See Pirelli
    Armstrong Tire Corp. Retiree Med. Benefits Trust v. Walgreen Comp., 
    631 F.3d 436
    , 448 (7th Cir.
    2011); Help At Home Inc. v. Medical Capital, L.L.C., 
    260 F.3d 748
    , 752 (7th Cir. 2001).
    Smith next contends that district court erred in rejecting his argument that equitable
    estoppel extended the period during which he could file his charge. He contends that the
    company withheld medical records from him and required him to continue with treatment
    that the records revealed was unnecessary. Equitable estoppel suspends the running of the
    filing period when the defendant takes active steps to prevent the plaintiff from suing,
    Barry, 
    377 F.3d at 689
    , including concealing evidence needed to determine the viability of a
    claim. See 
    id. at 689
    ; Cada, 920 F.2d at 421. The district court, however, properly deemed
    equitable estoppel inapplicable because Smith did not plead that the company deceived
    him. Although Smith’s response brief offers such an account, the court correctly disregarded
    that new account because the response brief paints a narrative different than that alleged in
    his complaint. See Car Carriers, Inc. v. Ford Motor Co., 
    745 F.2d 1101
    , 1107 (7th Cir. 1984).
    Last Smith argues that, even if his complaint was deficient, the district court should
    have granted him leave to amend under Federal Rule of Civil Procedure 15. Rule 15
    ordinarily requires that leave to amend be granted at least once when there is a potentially
    curable problem with the complaint. See Bausch v. Stryker Corp., 
    630 F.3d 546
    , 562 (7th Cir.
    2010). In this regard, Smith contends that the factual assertions advanced in his response
    brief would trigger the discovery rule and establish equitable estoppel, curing the problem
    of untimeliness.
    No. 11-2750                                                                                Page 3
    Before litigating an unlawful employment practice under the ADA, an employee
    must file a timely charge of discrimination with the EEOC. See 42 U.S.C. § 2000e-5(e)(1),
    incorporated by 
    42 U.S.C. § 12117
    (a); Stepney v. Naperville Sch. Dist. 203, 
    392 F.3d 236
    , 239 (7th
    Cir. 2004). A plaintiff must file a charge within 300 days “after the alleged unlawful
    employment practice occurred.” Chaudhry v. Nucor Steel-Indiana, 
    546 F.3d 832
     (7th Cir. 2008).
    The discovery rule postpones the beginning of the limitations period to the date when the
    plaintiff discovers or should have discovered that he has been injured. Barry Aviation Inc. v.
    Land O'Lakes Mun. Airport Com'n, 
    377 F.3d 682
    , 688-89 (7th Cir. 2004); Clark v. City of
    Braidwood, 
    318 F.3d 764
    , 767 (7th Cir. 2003).
    The district court correctly determined that the discovery rule did not excuse Smith’s
    untimelineness. As the court explained, the complaint says only that Smith discovered the
    refusal to reinstate in 2006 and did not file his charge until 2009, well after the 300-day filing
    period expired. See Chaudhry, 
    546 F.3d at 836
    . Given these allegations, the face of the
    complaint shows that the action is untimely. See United States v. Lewis, 
    411 F.3d 838
    , 842 (7th
    Cir. 2005). Although Smith advanced a new chronology in his response brief, the district
    court correctly disregarded that chronology because it differs from the account he pleaded,
    and he may not amend his complaint through the filing of a response brief. See Pirelli
    Armstrong Tire Corp. Retiree Med. Benefits Trust v. Walgreen Comp., 
    631 F.3d 436
    , 448 (7th Cir.
    2011); Help At Home Inc. v. Medical Capital, L.L.C., 
    260 F.3d 748
    , 752 (7th Cir. 2001).
    Smith next contends that district court erred in rejecting his argument that equitable
    estoppel extended the period during which he could file his charge. He contends that the
    company withheld medical records from him and required him to continue with treatment
    that the records revealed was unnecessary. Equitable estoppel suspends the running of the
    filing period when the defendant takes active steps to prevent the plaintiff from suing,
    Barry, 
    377 F.3d at 689
    , including concealing evidence needed to determine the viability of a
    claim. See 
    id. at 689
    ; Cada, 920 F.2d at 421. The district court, however, properly deemed
    equitable estoppel inapplicable because Smith did not plead that the company deceived
    him. Although Smith’s response brief offers such an account, the court correctly disregarded
    that new account because the response brief paints a narrative different than that alleged in
    his complaint. See Car Carriers, Inc. v. Ford Motor Co., 
    745 F.2d 1101
    , 1107 (7th Cir. 1984).
    Last Smith argues that, even if his complaint was deficient, the district court should
    have granted him leave to amend under Federal Rule of Civil Procedure 15. Rule 15
    ordinarily requires that leave to amend be granted at least once when there is a potentially
    curable problem with the complaint. See Bausch v. Stryker Corp., 
    630 F.3d 546
    , 562 (7th Cir.
    2010). In this regard, Smith contends that the factual assertions advanced in his response
    brief would trigger the discovery rule and establish equitable estoppel, curing the problem
    of untimeliness.
    No. 11-2750                                                                                Page 3
    Before litigating an unlawful employment practice under the ADA, an employee
    must file a timely charge of discrimination with the EEOC. See 42 U.S.C. § 2000e-5(e)(1),
    incorporated by 
    42 U.S.C. § 12117
    (a); Stepney v. Naperville Sch. Dist. 203, 
    392 F.3d 236
    , 239 (7th
    Cir. 2004). A plaintiff must file a charge within 300 days “after the alleged unlawful
    employment practice occurred.” Chaudhry v. Nucor Steel-Indiana, 
    546 F.3d 832
     (7th Cir. 2008).
    The discovery rule postpones the beginning of the limitations period to the date when the
    plaintiff discovers or should have discovered that he has been injured. Barry Aviation Inc. v.
    Land O'Lakes Mun. Airport Com'n, 
    377 F.3d 682
    , 688-89 (7th Cir. 2004); Clark v. City of
    Braidwood, 
    318 F.3d 764
    , 767 (7th Cir. 2003).
    The district court correctly determined that the discovery rule did not excuse Smith’s
    untimelineness. As the court explained, the complaint says only that Smith discovered the
    refusal to reinstate in 2006 and did not file his charge until 2009, well after the 300-day filing
    period expired. See Chaudhry, 
    546 F.3d at 836
    . Given these allegations, the face of the
    complaint shows that the action is untimely. See United States v. Lewis, 
    411 F.3d 838
    , 842 (7th
    Cir. 2005). Although Smith advanced a new chronology in his response brief, the district
    court correctly disregarded that chronology because it differs from the account he pleaded,
    and he may not amend his complaint through the filing of a response brief. See Pirelli
    Armstrong Tire Corp. Retiree Med. Benefits Trust v. Walgreen Comp., 
    631 F.3d 436
    , 448 (7th Cir.
    2011); Help At Home Inc. v. Medical Capital, L.L.C., 
    260 F.3d 748
    , 752 (7th Cir. 2001).
    Smith next contends that district court erred in rejecting his argument that equitable
    estoppel extended the period during which he could file his charge. He contends that the
    company withheld medical records from him and required him to continue with treatment
    that the records revealed was unnecessary. Equitable estoppel suspends the running of the
    filing period when the defendant takes active steps to prevent the plaintiff from suing,
    Barry, 
    377 F.3d at 689
    , including concealing evidence needed to determine the viability of a
    claim. See 
    id. at 689
    ; Cada, 920 F.2d at 421. The district court, however, properly deemed
    equitable estoppel inapplicable because Smith did not plead that the company deceived
    him. Although Smith’s response brief offers such an account, the court correctly disregarded
    that new account because the response brief paints a narrative different than that alleged in
    his complaint. See Car Carriers, Inc. v. Ford Motor Co., 
    745 F.2d 1101
    , 1107 (7th Cir. 1984).
    Last Smith argues that, even if his complaint was deficient, the district court should
    have granted him leave to amend under Federal Rule of Civil Procedure 15. Rule 15
    ordinarily requires that leave to amend be granted at least once when there is a potentially
    curable problem with the complaint. See Bausch v. Stryker Corp., 
    630 F.3d 546
    , 562 (7th Cir.
    2010). In this regard, Smith contends that the factual assertions advanced in his response
    brief would trigger the discovery rule and establish equitable estoppel, curing the problem
    of untimeliness.
    No. 11-2750                                                                                Page 3
    Before litigating an unlawful employment practice under the ADA, an employee
    must file a timely charge of discrimination with the EEOC. See 42 U.S.C. § 2000e-5(e)(1),
    incorporated by 
    42 U.S.C. § 12117
    (a); Stepney v. Naperville Sch. Dist. 203, 
    392 F.3d 236
    , 239 (7th
    Cir. 2004). A plaintiff must file a charge within 300 days “after the alleged unlawful
    employment practice occurred.” Chaudhry v. Nucor Steel-Indiana, 
    546 F.3d 832
     (7th Cir. 2008).
    The discovery rule postpones the beginning of the limitations period to the date when the
    plaintiff discovers or should have discovered that he has been injured. Barry Aviation Inc. v.
    Land O'Lakes Mun. Airport Com'n, 
    377 F.3d 682
    , 688-89 (7th Cir. 2004); Clark v. City of
    Braidwood, 
    318 F.3d 764
    , 767 (7th Cir. 2003).
    The district court correctly determined that the discovery rule did not excuse Smith’s
    untimelineness. As the court explained, the complaint says only that Smith discovered the
    refusal to reinstate in 2006 and did not file his charge until 2009, well after the 300-day filing
    period expired. See Chaudhry, 
    546 F.3d at 836
    . Given these allegations, the face of the
    complaint shows that the action is untimely. See United States v. Lewis, 
    411 F.3d 838
    , 842 (7th
    Cir. 2005). Although Smith advanced a new chronology in his response brief, the district
    court correctly disregarded that chronology because it differs from the account he pleaded,
    and he may not amend his complaint through the filing of a response brief. See Pirelli
    Armstrong Tire Corp. Retiree Med. Benefits Trust v. Walgreen Comp., 
    631 F.3d 436
    , 448 (7th Cir.
    2011); Help At Home Inc. v. Medical Capital, L.L.C., 
    260 F.3d 748
    , 752 (7th Cir. 2001).
    Smith next contends that district court erred in rejecting his argument that equitable
    estoppel extended the period during which he could file his charge. He contends that the
    company withheld medical records from him and required him to continue with treatment
    that the records revealed was unnecessary. Equitable estoppel suspends the running of the
    filing period when the defendant takes active steps to prevent the plaintiff from suing,
    Barry, 
    377 F.3d at 689
    , including concealing evidence needed to determine the viability of a
    claim. See 
    id. at 689
    ; Cada, 920 F.2d at 421. The district court, however, properly deemed
    equitable estoppel inapplicable because Smith did not plead that the company deceived
    him. Although Smith’s response brief offers such an account, the court correctly disregarded
    that new account because the response brief paints a narrative different than that alleged in
    his complaint. See Car Carriers, Inc. v. Ford Motor Co., 
    745 F.2d 1101
    , 1107 (7th Cir. 1984).
    Last Smith argues that, even if his complaint was deficient, the district court should
    have granted him leave to amend under Federal Rule of Civil Procedure 15. Rule 15
    ordinarily requires that leave to amend be granted at least once when there is a potentially
    curable problem with the complaint. See Bausch v. Stryker Corp., 
    630 F.3d 546
    , 562 (7th Cir.
    2010). In this regard, Smith contends that the factual assertions advanced in his response
    brief would trigger the discovery rule and establish equitable estoppel, curing the problem
    of untimeliness.
    No. 11-2750                                                                                Page 3
    Before litigating an unlawful employment practice under the ADA, an employee
    must file a timely charge of discrimination with the EEOC. See 42 U.S.C. § 2000e-5(e)(1),
    incorporated by 
    42 U.S.C. § 12117
    (a); Stepney v. Naperville Sch. Dist. 203, 
    392 F.3d 236
    , 239 (7th
    Cir. 2004). A plaintiff must file a charge within 300 days “after the alleged unlawful
    employment practice occurred.” Chaudhry v. Nucor Steel-Indiana, 
    546 F.3d 832
     (7th Cir. 2008).
    The discovery rule postpones the beginning of the limitations period to the date when the
    plaintiff discovers or should have discovered that he has been injured. Barry Aviation Inc. v.
    Land O'Lakes Mun. Airport Com'n, 
    377 F.3d 682
    , 688-89 (7th Cir. 2004); Clark v. City of
    Braidwood, 
    318 F.3d 764
    , 767 (7th Cir. 2003).
    The district court correctly determined that the discovery rule did not excuse Smith’s
    untimelineness. As the court explained, the complaint says only that Smith discovered the
    refusal to reinstate in 2006 and did not file his charge until 2009, well after the 300-day filing
    period expired. See Chaudhry, 
    546 F.3d at 836
    . Given these allegations, the face of the
    complaint shows that the action is untimely. See United States v. Lewis, 
    411 F.3d 838
    , 842 (7th
    Cir. 2005). Although Smith advanced a new chronology in his response brief, the district
    court correctly disregarded that chronology because it differs from the account he pleaded,
    and he may not amend his complaint through the filing of a response brief. See Pirelli
    Armstrong Tire Corp. Retiree Med. Benefits Trust v. Walgreen Comp., 
    631 F.3d 436
    , 448 (7th Cir.
    2011); Help At Home Inc. v. Medical Capital, L.L.C., 
    260 F.3d 748
    , 752 (7th Cir. 2001).
    Smith next contends that district court erred in rejecting his argument that equitable
    estoppel extended the period during which he could file his charge. He contends that the
    company withheld medical records from him and required him to continue with treatment
    that the records revealed was unnecessary. Equitable estoppel suspends the running of the
    filing period when the defendant takes active steps to prevent the plaintiff from suing,
    Barry, 
    377 F.3d at 689
    , including concealing evidence needed to determine the viability of a
    claim. See 
    id. at 689
    ; Cada, 920 F.2d at 421. The district court, however, properly deemed
    equitable estoppel inapplicable because Smith did not plead that the company deceived
    him. Although Smith’s response brief offers such an account, the court correctly disregarded
    that new account because the response brief paints a narrative different than that alleged in
    his complaint. See Car Carriers, Inc. v. Ford Motor Co., 
    745 F.2d 1101
    , 1107 (7th Cir. 1984).
    Last Smith argues that, even if his complaint was deficient, the district court should
    have granted him leave to amend under Federal Rule of Civil Procedure 15. Rule 15
    ordinarily requires that leave to amend be granted at least once when there is a potentially
    curable problem with the complaint. See Bausch v. Stryker Corp., 
    630 F.3d 546
    , 562 (7th Cir.
    2010). In this regard, Smith contends that the factual assertions advanced in his response
    brief would trigger the discovery rule and establish equitable estoppel, curing the problem
    of untimeliness.
    No. 11-2750                                                                                Page 3
    Before litigating an unlawful employment practice under the ADA, an employee
    must file a timely charge of discrimination with the EEOC. See 42 U.S.C. § 2000e-5(e)(1),
    incorporated by 
    42 U.S.C. § 12117
    (a); Stepney v. Naperville Sch. Dist. 203, 
    392 F.3d 236
    , 239 (7th
    Cir. 2004). A plaintiff must file a charge within 300 days “after the alleged unlawful
    employment practice occurred.” Chaudhry v. Nucor Steel-Indiana, 
    546 F.3d 832
     (7th Cir. 2008).
    The discovery rule postpones the beginning of the limitations period to the date when the
    plaintiff discovers or should have discovered that he has been injured. Barry Aviation Inc. v.
    Land O'Lakes Mun. Airport Com'n, 
    377 F.3d 682
    , 688-89 (7th Cir. 2004); Clark v. City of
    Braidwood, 
    318 F.3d 764
    , 767 (7th Cir. 2003).
    The district court correctly determined that the discovery rule did not excuse Smith’s
    untimelineness. As the court explained, the complaint says only that Smith discovered the
    refusal to reinstate in 2006 and did not file his charge until 2009, well after the 300-day filing
    period expired. See Chaudhry, 
    546 F.3d at 836
    . Given these allegations, the face of the
    complaint shows that the action is untimely. See United States v. Lewis, 
    411 F.3d 838
    , 842 (7th
    Cir. 2005). Although Smith advanced a new chronology in his response brief, the district
    court correctly disregarded that chronology because it differs from the account he pleaded,
    and he may not amend his complaint through the filing of a response brief. See Pirelli
    Armstrong Tire Corp. Retiree Med. Benefits Trust v. Walgreen Comp., 
    631 F.3d 436
    , 448 (7th Cir.
    2011); Help At Home Inc. v. Medical Capital, L.L.C., 
    260 F.3d 748
    , 752 (7th Cir. 2001).
    Smith next contends that district court erred in rejecting his argument that equitable
    estoppel extended the period during which he could file his charge. He contends that the
    company withheld medical records from him and required him to continue with treatment
    that the records revealed was unnecessary. Equitable estoppel suspends the running of the
    filing period when the defendant takes active steps to prevent the plaintiff from suing,
    Barry, 
    377 F.3d at 689
    , including concealing evidence needed to determine the viability of a
    claim. See 
    id. at 689
    ; Cada, 920 F.2d at 421. The district court, however, properly deemed
    equitable estoppel inapplicable because Smith did not plead that the company deceived
    him. Although Smith’s response brief offers such an account, the court correctly disregarded
    that new account because the response brief paints a narrative different than that alleged in
    his complaint. See Car Carriers, Inc. v. Ford Motor Co., 
    745 F.2d 1101
    , 1107 (7th Cir. 1984).
    Last Smith argues that, even if his complaint was deficient, the district court should
    have granted him leave to amend under Federal Rule of Civil Procedure 15. Rule 15
    ordinarily requires that leave to amend be granted at least once when there is a potentially
    curable problem with the complaint. See Bausch v. Stryker Corp., 
    630 F.3d 546
    , 562 (7th Cir.
    2010). In this regard, Smith contends that the factual assertions advanced in his response
    brief would trigger the discovery rule and establish equitable estoppel, curing the problem
    of untimeliness.
    No. 11-2750                                                                                Page 3
    Before litigating an unlawful employment practice under the ADA, an employee
    must file a timely charge of discrimination with the EEOC. See 42 U.S.C. § 2000e-5(e)(1),
    incorporated by 
    42 U.S.C. § 12117
    (a); Stepney v. Naperville Sch. Dist. 203, 
    392 F.3d 236
    , 239 (7th
    Cir. 2004). A plaintiff must file a charge within 300 days “after the alleged unlawful
    employment practice occurred.” Chaudhry v. Nucor Steel-Indiana, 
    546 F.3d 832
     (7th Cir. 2008).
    The discovery rule postpones the beginning of the limitations period to the date when the
    plaintiff discovers or should have discovered that he has been injured. Barry Aviation Inc. v.
    Land O'Lakes Mun. Airport Com'n, 
    377 F.3d 682
    , 688-89 (7th Cir. 2004); Clark v. City of
    Braidwood, 
    318 F.3d 764
    , 767 (7th Cir. 2003).
    The district court correctly determined that the discovery rule did not excuse Smith’s
    untimelineness. As the court explained, the complaint says only that Smith discovered the
    refusal to reinstate in 2006 and did not file his charge until 2009, well after the 300-day filing
    period expired. See Chaudhry, 
    546 F.3d at 836
    . Given these allegations, the face of the
    complaint shows that the action is untimely. See United States v. Lewis, 
    411 F.3d 838
    , 842 (7th
    Cir. 2005). Although Smith advanced a new chronology in his response brief, the district
    court correctly disregarded that chronology because it differs from the account he pleaded,
    and he may not amend his complaint through the filing of a response brief. See Pirelli
    Armstrong Tire Corp. Retiree Med. Benefits Trust v. Walgreen Comp., 
    631 F.3d 436
    , 448 (7th Cir.
    2011); Help At Home Inc. v. Medical Capital, L.L.C., 
    260 F.3d 748
    , 752 (7th Cir. 2001).
    Smith next contends that district court erred in rejecting his argument that equitable
    estoppel extended the period during which he could file his charge. He contends that the
    company withheld medical records from him and required him to continue with treatment
    that the records revealed was unnecessary. Equitable estoppel suspends the running of the
    filing period when the defendant takes active steps to prevent the plaintiff from suing,
    Barry, 
    377 F.3d at 689
    , including concealing evidence needed to determine the viability of a
    claim. See 
    id. at 689
    ; Cada, 920 F.2d at 421. The district court, however, properly deemed
    equitable estoppel inapplicable because Smith did not plead that the company deceived
    him. Although Smith’s response brief offers such an account, the court correctly disregarded
    that new account because the response brief paints a narrative different than that alleged in
    his complaint. See Car Carriers, Inc. v. Ford Motor Co., 
    745 F.2d 1101
    , 1107 (7th Cir. 1984).
    Last Smith argues that, even if his complaint was deficient, the district court should
    have granted him leave to amend under Federal Rule of Civil Procedure 15. Rule 15
    ordinarily requires that leave to amend be granted at least once when there is a potentially
    curable problem with the complaint. See Bausch v. Stryker Corp., 
    630 F.3d 546
    , 562 (7th Cir.
    2010). In this regard, Smith contends that the factual assertions advanced in his response
    brief would trigger the discovery rule and establish equitable estoppel, curing the problem
    of untimeliness.
    No. 11-2750                                                                                Page 3
    Before litigating an unlawful employment practice under the ADA, an employee
    must file a timely charge of discrimination with the EEOC. See 42 U.S.C. § 2000e-5(e)(1),
    incorporated by 
    42 U.S.C. § 12117
    (a); Stepney v. Naperville Sch. Dist. 203, 
    392 F.3d 236
    , 239 (7th
    Cir. 2004). A plaintiff must file a charge within 300 days “after the alleged unlawful
    employment practice occurred.” Chaudhry v. Nucor Steel-Indiana, 
    546 F.3d 832
     (7th Cir. 2008).
    The discovery rule postpones the beginning of the limitations period to the date when the
    plaintiff discovers or should have discovered that he has been injured. Barry Aviation Inc. v.
    Land O'Lakes Mun. Airport Com'n, 
    377 F.3d 682
    , 688-89 (7th Cir. 2004); Clark v. City of
    Braidwood, 
    318 F.3d 764
    , 767 (7th Cir. 2003).
    The district court correctly determined that the discovery rule did not excuse Smith’s
    untimelineness. As the court explained, the complaint says only that Smith discovered the
    refusal to reinstate in 2006 and did not file his charge until 2009, well after the 300-day filing
    period expired. See Chaudhry, 
    546 F.3d at 836
    . Given these allegations, the face of the
    complaint shows that the action is untimely. See United States v. Lewis, 
    411 F.3d 838
    , 842 (7th
    Cir. 2005). Although Smith advanced a new chronology in his response brief, the district
    court correctly disregarded that chronology because it differs from the account he pleaded,
    and he may not amend his complaint through the filing of a response brief. See Pirelli
    Armstrong Tire Corp. Retiree Med. Benefits Trust v. Walgreen Comp., 
    631 F.3d 436
    , 448 (7th Cir.
    2011); Help At Home Inc. v. Medical Capital, L.L.C., 
    260 F.3d 748
    , 752 (7th Cir. 2001).
    Smith next contends that district court erred in rejecting his argument that equitable
    estoppel extended the period during which he could file his charge. He contends that the
    company withheld medical records from him and required him to continue with treatment
    that the records revealed was unnecessary. Equitable estoppel suspends the running of the
    filing period when the defendant takes active steps to prevent the plaintiff from suing,
    Barry, 
    377 F.3d at 689
    , including concealing evidence needed to determine the viability of a
    claim. See 
    id. at 689
    ; Cada, 920 F.2d at 421. The district court, however, properly deemed
    equitable estoppel inapplicable because Smith did not plead that the company deceived
    him. Although Smith’s response brief offers such an account, the court correctly disregarded
    that new account because the response brief paints a narrative different than that alleged in
    his complaint. See Car Carriers, Inc. v. Ford Motor Co., 
    745 F.2d 1101
    , 1107 (7th Cir. 1984).
    Last Smith argues that, even if his complaint was deficient, the district court should
    have granted him leave to amend under Federal Rule of Civil Procedure 15. Rule 15
    ordinarily requires that leave to amend be granted at least once when there is a potentially
    curable problem with the complaint. See Bausch v. Stryker Corp., 
    630 F.3d 546
    , 562 (7th Cir.
    2010). In this regard, Smith contends that the factual assertions advanced in his response
    brief would trigger the discovery rule and establish equitable estoppel, curing the problem
    of untimeliness.
    No. 11-2750                                                                                Page 3
    Before litigating an unlawful employment practice under the ADA, an employee
    must file a timely charge of discrimination with the EEOC. See 42 U.S.C. § 2000e-5(e)(1),
    incorporated by 
    42 U.S.C. § 12117
    (a); Stepney v. Naperville Sch. Dist. 203, 
    392 F.3d 236
    , 239 (7th
    Cir. 2004). A plaintiff must file a charge within 300 days “after the alleged unlawful
    employment practice occurred.” Chaudhry v. Nucor Steel-Indiana, 
    546 F.3d 832
     (7th Cir. 2008).
    The discovery rule postpones the beginning of the limitations period to the date when the
    plaintiff discovers or should have discovered that he has been injured. Barry Aviation Inc. v.
    Land O'Lakes Mun. Airport Com'n, 
    377 F.3d 682
    , 688-89 (7th Cir. 2004); Clark v. City of
    Braidwood, 
    318 F.3d 764
    , 767 (7th Cir. 2003).
    The district court correctly determined that the discovery rule did not excuse Smith’s
    untimelineness. As the court explained, the complaint says only that Smith discovered the
    refusal to reinstate in 2006 and did not file his charge until 2009, well after the 300-day filing
    period expired. See Chaudhry, 
    546 F.3d at 836
    . Given these allegations, the face of the
    complaint shows that the action is untimely. See United States v. Lewis, 
    411 F.3d 838
    , 842 (7th
    Cir. 2005). Although Smith advanced a new chronology in his response brief, the district
    court correctly disregarded that chronology because it differs from the account he pleaded,
    and he may not amend his complaint through the filing of a response brief. See Pirelli
    Armstrong Tire Corp. Retiree Med. Benefits Trust v. Walgreen Comp., 
    631 F.3d 436
    , 448 (7th Cir.
    2011); Help At Home Inc. v. Medical Capital, L.L.C., 
    260 F.3d 748
    , 752 (7th Cir. 2001).
    Smith next contends that district court erred in rejecting his argument that equitable
    estoppel extended the period during which he could file his charge. He contends that the
    company withheld medical records from him and required him to continue with treatment
    that the records revealed was unnecessary. Equitable estoppel suspends the running of the
    filing period when the defendant takes active steps to prevent the plaintiff from suing,
    Barry, 
    377 F.3d at 689
    , including concealing evidence needed to determine the viability of a
    claim. See 
    id. at 689
    ; Cada, 920 F.2d at 421. The district court, however, properly deemed
    equitable estoppel inapplicable because Smith did not plead that the company deceived
    him. Although Smith’s response brief offers such an account, the court correctly disregarded
    that new account because the response brief paints a narrative different than that alleged in
    his complaint. See Car Carriers, Inc. v. Ford Motor Co., 
    745 F.2d 1101
    , 1107 (7th Cir. 1984).
    Last Smith argues that, even if his complaint was deficient, the district court should
    have granted him leave to amend under Federal Rule of Civil Procedure 15. Rule 15
    ordinarily requires that leave to amend be granted at least once when there is a potentially
    curable problem with the complaint. See Bausch v. Stryker Corp., 
    630 F.3d 546
    , 562 (7th Cir.
    2010). In this regard, Smith contends that the factual assertions advanced in his response
    brief would trigger the discovery rule and establish equitable estoppel, curing the problem
    of untimeliness.
    No. 11-2750                                                                                Page 3
    Before litigating an unlawful employment practice under the ADA, an employee
    must file a timely charge of discrimination with the EEOC. See 42 U.S.C. § 2000e-5(e)(1),
    incorporated by 
    42 U.S.C. § 12117
    (a); Stepney v. Naperville Sch. Dist. 203, 
    392 F.3d 236
    , 239 (7th
    Cir. 2004). A plaintiff must file a charge within 300 days “after the alleged unlawful
    employment practice occurred.” Chaudhry v. Nucor Steel-Indiana, 
    546 F.3d 832
     (7th Cir. 2008).
    The discovery rule postpones the beginning of the limitations period to the date when the
    plaintiff discovers or should have discovered that he has been injured. Barry Aviation Inc. v.
    Land O'Lakes Mun. Airport Com'n, 
    377 F.3d 682
    , 688-89 (7th Cir. 2004); Clark v. City of
    Braidwood, 
    318 F.3d 764
    , 767 (7th Cir. 2003).
    The district court correctly determined that the discovery rule did not excuse Smith’s
    untimelineness. As the court explained, the complaint says only that Smith discovered the
    refusal to reinstate in 2006 and did not file his charge until 2009, well after the 300-day filing
    period expired. See Chaudhry, 
    546 F.3d at 836
    . Given these allegations, the face of the
    complaint shows that the action is untimely. See United States v. Lewis, 
    411 F.3d 838
    , 842 (7th
    Cir. 2005). Although Smith advanced a new chronology in his response brief, the district
    court correctly disregarded that chronology because it differs from the account he pleaded,
    and he may not amend his complaint through the filing of a response brief. See Pirelli
    Armstrong Tire Corp. Retiree Med. Benefits Trust v. Walgreen Comp., 
    631 F.3d 436
    , 448 (7th Cir.
    2011); Help At Home Inc. v. Medical Capital, L.L.C., 
    260 F.3d 748
    , 752 (7th Cir. 2001).
    Smith next contends that district court erred in rejecting his argument that equitable
    estoppel extended the period during which he could file his charge. He contends that the
    company withheld medical records from him and required him to continue with treatment
    that the records revealed was unnecessary. Equitable estoppel suspends the running of the
    filing period when the defendant takes active steps to prevent the plaintiff from suing,
    Barry, 
    377 F.3d at 689
    , including concealing evidence needed to determine the viability of a
    claim. See 
    id. at 689
    ; Cada, 920 F.2d at 421. The district court, however, properly deemed
    equitable estoppel inapplicable because Smith did not plead that the company deceived
    him. Although Smith’s response brief offers such an account, the court correctly disregarded
    that new account because the response brief paints a narrative different than that alleged in
    his complaint. See Car Carriers, Inc. v. Ford Motor Co., 
    745 F.2d 1101
    , 1107 (7th Cir. 1984).
    Last Smith argues that, even if his complaint was deficient, the district court should
    have granted him leave to amend under Federal Rule of Civil Procedure 15. Rule 15
    ordinarily requires that leave to amend be granted at least once when there is a potentially
    curable problem with the complaint. See Bausch v. Stryker Corp., 
    630 F.3d 546
    , 562 (7th Cir.
    2010). In this regard, Smith contends that the factual assertions advanced in his response
    brief would trigger the discovery rule and establish equitable estoppel, curing the problem
    of untimeliness.
    No. 11-2750                                                                                Page 3
    Before litigating an unlawful employment practice under the ADA, an employee
    must file a timely charge of discrimination with the EEOC. See 42 U.S.C. § 2000e-5(e)(1),
    incorporated by 
    42 U.S.C. § 12117
    (a); Stepney v. Naperville Sch. Dist. 203, 
    392 F.3d 236
    , 239 (7th
    Cir. 2004). A plaintiff must file a charge within 300 days “after the alleged unlawful
    employment practice occurred.” Chaudhry v. Nucor Steel-Indiana, 
    546 F.3d 832
     (7th Cir. 2008).
    The discovery rule postpones the beginning of the limitations period to the date when the
    plaintiff discovers or should have discovered that he has been injured. Barry Aviation Inc. v.
    Land O'Lakes Mun. Airport Com'n, 
    377 F.3d 682
    , 688-89 (7th Cir. 2004); Clark v. City of
    Braidwood, 
    318 F.3d 764
    , 767 (7th Cir. 2003).
    The district court correctly determined that the discovery rule did not excuse Smith’s
    untimelineness. As the court explained, the complaint says only that Smith discovered the
    refusal to reinstate in 2006 and did not file his charge until 2009, well after the 300-day filing
    period expired. See Chaudhry, 
    546 F.3d at 836
    . Given these allegations, the face of the
    complaint shows that the action is untimely. See United States v. Lewis, 
    411 F.3d 838
    , 842 (7th
    Cir. 2005). Although Smith advanced a new chronology in his response brief, the district
    court correctly disregarded that chronology because it differs from the account he pleaded,
    and he may not amend his complaint through the filing of a response brief. See Pirelli
    Armstrong Tire Corp. Retiree Med. Benefits Trust v. Walgreen Comp., 
    631 F.3d 436
    , 448 (7th Cir.
    2011); Help At Home Inc. v. Medical Capital, L.L.C., 
    260 F.3d 748
    , 752 (7th Cir. 2001).
    Smith next contends that district court erred in rejecting his argument that equitable
    estoppel extended the period during which he could file his charge. He contends that the
    company withheld medical records from him and required him to continue with treatment
    that the records revealed was unnecessary. Equitable estoppel suspends the running of the
    filing period when the defendant takes active steps to prevent the plaintiff from suing,
    Barry, 
    377 F.3d at 689
    , including concealing evidence needed to determine the viability of a
    claim. See 
    id. at 689
    ; Cada, 920 F.2d at 421. The district court, however, properly deemed
    equitable estoppel inapplicable because Smith did not plead that the company deceived
    him. Although Smith’s response brief offers such an account, the court correctly disregarded
    that new account because the response brief paints a narrative different than that alleged in
    his complaint. See Car Carriers, Inc. v. Ford Motor Co., 
    745 F.2d 1101
    , 1107 (7th Cir. 1984).
    Last Smith argues that, even if his complaint was deficient, the district court should
    have granted him leave to amend under Federal Rule of Civil Procedure 15. Rule 15
    ordinarily requires that leave to amend be granted at least once when there is a potentially
    curable problem with the complaint. See Bausch v. Stryker Corp., 
    630 F.3d 546
    , 562 (7th Cir.
    2010). In this regard, Smith contends that the factual assertions advanced in his response
    brief would trigger the discovery rule and establish equitable estoppel, curing the problem
    of untimeliness.
    No. 11-2750                                                                                Page 3
    Before litigating an unlawful employment practice under the ADA, an employee
    must file a timely charge of discrimination with the EEOC. See 42 U.S.C. § 2000e-5(e)(1),
    incorporated by 
    42 U.S.C. § 12117
    (a); Stepney v. Naperville Sch. Dist. 203, 
    392 F.3d 236
    , 239 (7th
    Cir. 2004). A plaintiff must file a charge within 300 days “after the alleged unlawful
    employment practice occurred.” Chaudhry v. Nucor Steel-Indiana, 
    546 F.3d 832
     (7th Cir. 2008).
    The discovery rule postpones the beginning of the limitations period to the date when the
    plaintiff discovers or should have discovered that he has been injured. Barry Aviation Inc. v.
    Land O'Lakes Mun. Airport Com'n, 
    377 F.3d 682
    , 688-89 (7th Cir. 2004); Clark v. City of
    Braidwood, 
    318 F.3d 764
    , 767 (7th Cir. 2003).
    The district court correctly determined that the discovery rule did not excuse Smith’s
    untimelineness. As the court explained, the complaint says only that Smith discovered the
    refusal to reinstate in 2006 and did not file his charge until 2009, well after the 300-day filing
    period expired. See Chaudhry, 
    546 F.3d at 836
    . Given these allegations, the face of the
    complaint shows that the action is untimely. See United States v. Lewis, 
    411 F.3d 838
    , 842 (7th
    Cir. 2005). Although Smith advanced a new chronology in his response brief, the district
    court correctly disregarded that chronology because it differs from the account he pleaded,
    and he may not amend his complaint through the filing of a response brief. See Pirelli
    Armstrong Tire Corp. Retiree Med. Benefits Trust v. Walgreen Comp., 
    631 F.3d 436
    , 448 (7th Cir.
    2011); Help At Home Inc. v. Medical Capital, L.L.C., 
    260 F.3d 748
    , 752 (7th Cir. 2001).
    Smith next contends that district court erred in rejecting his argument that equitable
    estoppel extended the period during which he could file his charge. He contends that the
    company withheld medical records from him and required him to continue with treatment
    that the records revealed was unnecessary. Equitable estoppel suspends the running of the
    filing period when the defendant takes active steps to prevent the plaintiff from suing,
    Barry, 
    377 F.3d at 689
    , including concealing evidence needed to determine the viability of a
    claim. See 
    id. at 689
    ; Cada, 920 F.2d at 421. The district court, however, properly deemed
    equitable estoppel inapplicable because Smith did not plead that the company deceived
    him. Although Smith’s response brief offers such an account, the court correctly disregarded
    that new account because the response brief paints a narrative different than that alleged in
    his complaint. See Car Carriers, Inc. v. Ford Motor Co., 
    745 F.2d 1101
    , 1107 (7th Cir. 1984).
    Last Smith argues that, even if his complaint was deficient, the district court should
    have granted him leave to amend under Federal Rule of Civil Procedure 15. Rule 15
    ordinarily requires that leave to amend be granted at least once when there is a potentially
    curable problem with the complaint. See Bausch v. Stryker Corp., 
    630 F.3d 546
    , 562 (7th Cir.
    2010). In this regard, Smith contends that the factual assertions advanced in his response
    brief would trigger the discovery rule and establish equitable estoppel, curing the problem
    of untimeliness.
    No. 11-2750                                                                                Page 3
    Before litigating an unlawful employment practice under the ADA, an employee
    must file a timely charge of discrimination with the EEOC. See 42 U.S.C. § 2000e-5(e)(1),
    incorporated by 
    42 U.S.C. § 12117
    (a); Stepney v. Naperville Sch. Dist. 203, 
    392 F.3d 236
    , 239 (7th
    Cir. 2004). A plaintiff must file a charge within 300 days “after the alleged unlawful
    employment practice occurred.” Chaudhry v. Nucor Steel-Indiana, 
    546 F.3d 832
     (7th Cir. 2008).
    The discovery rule postpones the beginning of the limitations period to the date when the
    plaintiff discovers or should have discovered that he has been injured. Barry Aviation Inc. v.
    Land O'Lakes Mun. Airport Com'n, 
    377 F.3d 682
    , 688-89 (7th Cir. 2004); Clark v. City of
    Braidwood, 
    318 F.3d 764
    , 767 (7th Cir. 2003).
    The district court correctly determined that the discovery rule did not excuse Smith’s
    untimelineness. As the court explained, the complaint says only that Smith discovered the
    refusal to reinstate in 2006 and did not file his charge until 2009, well after the 300-day filing
    period expired. See Chaudhry, 
    546 F.3d at 836
    . Given these allegations, the face of the
    complaint shows that the action is untimely. See United States v. Lewis, 
    411 F.3d 838
    , 842 (7th
    Cir. 2005). Although Smith advanced a new chronology in his response brief, the district
    court correctly disregarded that chronology because it differs from the account he pleaded,
    and he may not amend his complaint through the filing of a response brief. See Pirelli
    Armstrong Tire Corp. Retiree Med. Benefits Trust v. Walgreen Comp., 
    631 F.3d 436
    , 448 (7th Cir.
    2011); Help At Home Inc. v. Medical Capital, L.L.C., 
    260 F.3d 748
    , 752 (7th Cir. 2001).
    Smith next contends that district court erred in rejecting his argument that equitable
    estoppel extended the period during which he could file his charge. He contends that the
    company withheld medical records from him and required him to continue with treatment
    that the records revealed was unnecessary. Equitable estoppel suspends the running of the
    filing period when the defendant takes active steps to prevent the plaintiff from suing,
    Barry, 
    377 F.3d at 689
    , including concealing evidence needed to determine the viability of a
    claim. See 
    id. at 689
    ; Cada, 920 F.2d at 421. The district court, however, properly deemed
    equitable estoppel inapplicable because Smith did not plead that the company deceived
    him. Although Smith’s response brief offers such an account, the court correctly disregarded
    that new account because the response brief paints a narrative different than that alleged in
    his complaint. See Car Carriers, Inc. v. Ford Motor Co., 
    745 F.2d 1101
    , 1107 (7th Cir. 1984).
    Last Smith argues that, even if his complaint was deficient, the district court should
    have granted him leave to amend under Federal Rule of Civil Procedure 15. Rule 15
    ordinarily requires that leave to amend be granted at least once when there is a potentially
    curable problem with the complaint. See Bausch v. Stryker Corp., 
    630 F.3d 546
    , 562 (7th Cir.
    2010). In this regard, Smith contends that the factual assertions advanced in his response
    brief would trigger the discovery rule and establish equitable estoppel, curing the problem
    of untimeliness.
    No. 11-2750                                                                                Page 3
    Before litigating an unlawful employment practice under the ADA, an employee
    must file a timely charge of discrimination with the EEOC. See 42 U.S.C. § 2000e-5(e)(1),
    incorporated by 
    42 U.S.C. § 12117
    (a); Stepney v. Naperville Sch. Dist. 203, 
    392 F.3d 236
    , 239 (7th
    Cir. 2004). A plaintiff must file a charge within 300 days “after the alleged unlawful
    employment practice occurred.” Chaudhry v. Nucor Steel-Indiana, 
    546 F.3d 832
     (7th Cir. 2008).
    The discovery rule postpones the beginning of the limitations period to the date when the
    plaintiff discovers or should have discovered that he has been injured. Barry Aviation Inc. v.
    Land O'Lakes Mun. Airport Com'n, 
    377 F.3d 682
    , 688-89 (7th Cir. 2004); Clark v. City of
    Braidwood, 
    318 F.3d 764
    , 767 (7th Cir. 2003).
    The district court correctly determined that the discovery rule did not excuse Smith’s
    untimelineness. As the court explained, the complaint says only that Smith discovered the
    refusal to reinstate in 2006 and did not file his charge until 2009, well after the 300-day filing
    period expired. See Chaudhry, 
    546 F.3d at 836
    . Given these allegations, the face of the
    complaint shows that the action is untimely. See United States v. Lewis, 
    411 F.3d 838
    , 842 (7th
    Cir. 2005). Although Smith advanced a new chronology in his response brief, the district
    court correctly disregarded that chronology because it differs from the account he pleaded,
    and he may not amend his complaint through the filing of a response brief. See Pirelli
    Armstrong Tire Corp. Retiree Med. Benefits Trust v. Walgreen Comp., 
    631 F.3d 436
    , 448 (7th Cir.
    2011); Help At Home Inc. v. Medical Capital, L.L.C., 
    260 F.3d 748
    , 752 (7th Cir. 2001).
    Smith next contends that district court erred in rejecting his argument that equitable
    estoppel extended the period during which he could file his charge. He contends that the
    company withheld medical records from him and required him to continue with treatment
    that the records revealed was unnecessary. Equitable estoppel suspends the running of the
    filing period when the defendant takes active steps to prevent the plaintiff from suing,
    Barry, 
    377 F.3d at 689
    , including concealing evidence needed to determine the viability of a
    claim. See 
    id. at 689
    ; Cada, 920 F.2d at 421. The district court, however, properly deemed
    equitable estoppel inapplicable because Smith did not plead that the company deceived
    him. Although Smith’s response brief offers such an account, the court correctly disregarded
    that new account because the response brief paints a narrative different than that alleged in
    his complaint. See Car Carriers, Inc. v. Ford Motor Co., 
    745 F.2d 1101
    , 1107 (7th Cir. 1984).
    Last Smith argues that, even if his complaint was deficient, the district court should
    have granted him leave to amend under Federal Rule of Civil Procedure 15. Rule 15
    ordinarily requires that leave to amend be granted at least once when there is a potentially
    curable problem with the complaint. See Bausch v. Stryker Corp., 
    630 F.3d 546
    , 562 (7th Cir.
    2010). In this regard, Smith contends that the factual assertions advanced in his response
    brief would trigger the discovery rule and establish equitable estoppel, curing the problem
    of untimeliness.
    No. 11-2750                                                                                Page 3
    Before litigating an unlawful employment practice under the ADA, an employee
    must file a timely charge of discrimination with the EEOC. See 42 U.S.C. § 2000e-5(e)(1),
    incorporated by 
    42 U.S.C. § 12117
    (a); Stepney v. Naperville Sch. Dist. 203, 
    392 F.3d 236
    , 239 (7th
    Cir. 2004). A plaintiff must file a charge within 300 days “after the alleged unlawful
    employment practice occurred.” Chaudhry v. Nucor Steel-Indiana, 
    546 F.3d 832
     (7th Cir. 2008).
    The discovery rule postpones the beginning of the limitations period to the date when the
    plaintiff discovers or should have discovered that he has been injured. Barry Aviation Inc. v.
    Land O'Lakes Mun. Airport Com'n, 
    377 F.3d 682
    , 688-89 (7th Cir. 2004); Clark v. City of
    Braidwood, 
    318 F.3d 764
    , 767 (7th Cir. 2003).
    The district court correctly determined that the discovery rule did not excuse Smith’s
    untimelineness. As the court explained, the complaint says only that Smith discovered the
    refusal to reinstate in 2006 and did not file his charge until 2009, well after the 300-day filing
    period expired. See Chaudhry, 
    546 F.3d at 836
    . Given these allegations, the face of the
    complaint shows that the action is untimely. See United States v. Lewis, 
    411 F.3d 838
    , 842 (7th
    Cir. 2005). Although Smith advanced a new chronology in his response brief, the district
    court correctly disregarded that chronology because it differs from the account he pleaded,
    and he may not amend his complaint through the filing of a response brief. See Pirelli
    Armstrong Tire Corp. Retiree Med. Benefits Trust v. Walgreen Comp., 
    631 F.3d 436
    , 448 (7th Cir.
    2011); Help At Home Inc. v. Medical Capital, L.L.C., 
    260 F.3d 748
    , 752 (7th Cir. 2001).
    Smith next contends that district court erred in rejecting his argument that equitable
    estoppel extended the period during which he could file his charge. He contends that the
    company withheld medical records from him and required him to continue with treatment
    that the records revealed was unnecessary. Equitable estoppel suspends the running of the
    filing period when the defendant takes active steps to prevent the plaintiff from suing,
    Barry, 
    377 F.3d at 689
    , including concealing evidence needed to determine the viability of a
    claim. See 
    id. at 689
    ; Cada, 920 F.2d at 421. The district court, however, properly deemed
    equitable estoppel inapplicable because Smith did not plead that the company deceived
    him. Although Smith’s response brief offers such an account, the court correctly disregarded
    that new account because the response brief paints a narrative different than that alleged in
    his complaint. See Car Carriers, Inc. v. Ford Motor Co., 
    745 F.2d 1101
    , 1107 (7th Cir. 1984).
    Last Smith argues that, even if his complaint was deficient, the district court should
    have granted him leave to amend under Federal Rule of Civil Procedure 15. Rule 15
    ordinarily requires that leave to amend be granted at least once when there is a potentially
    curable problem with the complaint. See Bausch v. Stryker Corp., 
    630 F.3d 546
    , 562 (7th Cir.
    2010). In this regard, Smith contends that the factual assertions advanced in his response
    brief would trigger the discovery rule and establish equitable estoppel, curing the problem
    of untimeliness.
    No. 11-2750                                                                                Page 3
    Before litigating an unlawful employment practice under the ADA, an employee
    must file a timely charge of discrimination with the EEOC. See 42 U.S.C. § 2000e-5(e)(1),
    incorporated by 
    42 U.S.C. § 12117
    (a); Stepney v. Naperville Sch. Dist. 203, 
    392 F.3d 236
    , 239 (7th
    Cir. 2004). A plaintiff must file a charge within 300 days “after the alleged unlawful
    employment practice occurred.” Chaudhry v. Nucor Steel-Indiana, 
    546 F.3d 832
     (7th Cir. 2008).
    The discovery rule postpones the beginning of the limitations period to the date when the
    plaintiff discovers or should have discovered that he has been injured. Barry Aviation Inc. v.
    Land O'Lakes Mun. Airport Com'n, 
    377 F.3d 682
    , 688-89 (7th Cir. 2004); Clark v. City of
    Braidwood, 
    318 F.3d 764
    , 767 (7th Cir. 2003).
    The district court correctly determined that the discovery rule did not excuse Smith’s
    untimelineness. As the court explained, the complaint says only that Smith discovered the
    refusal to reinstate in 2006 and did not file his charge until 2009, well after the 300-day filing
    period expired. See Chaudhry, 
    546 F.3d at 836
    . Given these allegations, the face of the
    complaint shows that the action is untimely. See United States v. Lewis, 
    411 F.3d 838
    , 842 (7th
    Cir. 2005). Although Smith advanced a new chronology in his response brief, the district
    court correctly disregarded that chronology because it differs from the account he pleaded,
    and he may not amend his complaint through the filing of a response brief. See Pirelli
    Armstrong Tire Corp. Retiree Med. Benefits Trust v. Walgreen Comp., 
    631 F.3d 436
    , 448 (7th Cir.
    2011); Help At Home Inc. v. Medical Capital, L.L.C., 
    260 F.3d 748
    , 752 (7th Cir. 2001).
    Smith next contends that district court erred in rejecting his argument that equitable
    estoppel extended the period during which he could file his charge. He contends that the
    company withheld medical records from him and required him to continue with treatment
    that the records revealed was unnecessary. Equitable estoppel suspends the running of the
    filing period when the defendant takes active steps to prevent the plaintiff from suing,
    Barry, 
    377 F.3d at 689
    , including concealing evidence needed to determine the viability of a
    claim. See 
    id. at 689
    ; Cada, 920 F.2d at 421. The district court, however, properly deemed
    equitable estoppel inapplicable because Smith did not plead that the company deceived
    him. Although Smith’s response brief offers such an account, the court correctly disregarded
    that new account because the response brief paints a narrative different than that alleged in
    his complaint. See Car Carriers, Inc. v. Ford Motor Co., 
    745 F.2d 1101
    , 1107 (7th Cir. 1984).
    Last Smith argues that, even if his complaint was deficient, the district court should
    have granted him leave to amend under Federal Rule of Civil Procedure 15. Rule 15
    ordinarily requires that leave to amend be granted at least once when there is a potentially
    curable problem with the complaint. See Bausch v. Stryker Corp., 
    630 F.3d 546
    , 562 (7th Cir.
    2010). In this regard, Smith contends that the factual assertions advanced in his response
    brief would trigger the discovery rule and establish equitable estoppel, curing the problem
    of untimeliness.
    No. 11-2750                                                                                Page 3
    Before litigating an unlawful employment practice under the ADA, an employee
    must file a timely charge of discrimination with the EEOC. See 42 U.S.C. § 2000e-5(e)(1),
    incorporated by 
    42 U.S.C. § 12117
    (a); Stepney v. Naperville Sch. Dist. 203, 
    392 F.3d 236
    , 239 (7th
    Cir. 2004). A plaintiff must file a charge within 300 days “after the alleged unlawful
    employment practice occurred.” Chaudhry v. Nucor Steel-Indiana, 
    546 F.3d 832
     (7th Cir. 2008).
    The discovery rule postpones the beginning of the limitations period to the date when the
    plaintiff discovers or should have discovered that he has been injured. Barry Aviation Inc. v.
    Land O'Lakes Mun. Airport Com'n, 
    377 F.3d 682
    , 688-89 (7th Cir. 2004); Clark v. City of
    Braidwood, 
    318 F.3d 764
    , 767 (7th Cir. 2003).
    The district court correctly determined that the discovery rule did not excuse Smith’s
    untimelineness. As the court explained, the complaint says only that Smith discovered the
    refusal to reinstate in 2006 and did not file his charge until 2009, well after the 300-day filing
    period expired. See Chaudhry, 
    546 F.3d at 836
    . Given these allegations, the face of the
    complaint shows that the action is untimely. See United States v. Lewis, 
    411 F.3d 838
    , 842 (7th
    Cir. 2005). Although Smith advanced a new chronology in his response brief, the district
    court correctly disregarded that chronology because it differs from the account he pleaded,
    and he may not amend his complaint through the filing of a response brief. See Pirelli
    Armstrong Tire Corp. Retiree Med. Benefits Trust v. Walgreen Comp., 
    631 F.3d 436
    , 448 (7th Cir.
    2011); Help At Home Inc. v. Medical Capital, L.L.C., 
    260 F.3d 748
    , 752 (7th Cir. 2001).
    Smith next contends that district court erred in rejecting his argument that equitable
    estoppel extended the period during which he could file his charge. He contends that the
    company withheld medical records from him and required him to continue with treatment
    that the records revealed was unnecessary. Equitable estoppel suspends the running of the
    filing period when the defendant takes active steps to prevent the plaintiff from suing,
    Barry, 
    377 F.3d at 689
    , including concealing evidence needed to determine the viability of a
    claim. See 
    id. at 689
    ; Cada, 920 F.2d at 421. The district court, however, properly deemed
    equitable estoppel inapplicable because Smith did not plead that the company deceived
    him. Although Smith’s response brief offers such an account, the court correctly disregarded
    that new account because the response brief paints a narrative different than that alleged in
    his complaint. See Car Carriers, Inc. v. Ford Motor Co., 
    745 F.2d 1101
    , 1107 (7th Cir. 1984).
    Last Smith argues that, even if his complaint was deficient, the district court should
    have granted him leave to amend under Federal Rule of Civil Procedure 15. Rule 15
    ordinarily requires that leave to amend be granted at least once when there is a potentially
    curable problem with the complaint. See Bausch v. Stryker Corp., 
    630 F.3d 546
    , 562 (7th Cir.
    2010). In this regard, Smith contends that the factual assertions advanced in his response
    brief would trigger the discovery rule and establish equitable estoppel, curing the problem
    of untimeliness.
    No. 11-2750                                                                                Page 3
    Before litigating an unlawful employment practice under the ADA, an employee
    must file a timely charge of discrimination with the EEOC. See 42 U.S.C. § 2000e-5(e)(1),
    incorporated by 
    42 U.S.C. § 12117
    (a); Stepney v. Naperville Sch. Dist. 203, 
    392 F.3d 236
    , 239 (7th
    Cir. 2004). A plaintiff must file a charge within 300 days “after the alleged unlawful
    employment practice occurred.” Chaudhry v. Nucor Steel-Indiana, 
    546 F.3d 832
     (7th Cir. 2008).
    The discovery rule postpones the beginning of the limitations period to the date when the
    plaintiff discovers or should have discovered that he has been injured. Barry Aviation Inc. v.
    Land O'Lakes Mun. Airport Com'n, 
    377 F.3d 682
    , 688-89 (7th Cir. 2004); Clark v. City of
    Braidwood, 
    318 F.3d 764
    , 767 (7th Cir. 2003).
    The district court correctly determined that the discovery rule did not excuse Smith’s
    untimelineness. As the court explained, the complaint says only that Smith discovered the
    refusal to reinstate in 2006 and did not file his charge until 2009, well after the 300-day filing
    period expired. See Chaudhry, 
    546 F.3d at 836
    . Given these allegations, the face of the
    complaint shows that the action is untimely. See United States v. Lewis, 
    411 F.3d 838
    , 842 (7th
    Cir. 2005). Although Smith advanced a new chronology in his response brief, the district
    court correctly disregarded that chronology because it differs from the account he pleaded,
    and he may not amend his complaint through the filing of a response brief. See Pirelli
    Armstrong Tire Corp. Retiree Med. Benefits Trust v. Walgreen Comp., 
    631 F.3d 436
    , 448 (7th Cir.
    2011); Help At Home Inc. v. Medical Capital, L.L.C., 
    260 F.3d 748
    , 752 (7th Cir. 2001).
    Smith next contends that district court erred in rejecting his argument that equitable
    estoppel extended the period during which he could file his charge. He contends that the
    company withheld medical records from him and required him to continue with treatment
    that the records revealed was unnecessary. Equitable estoppel suspends the running of the
    filing period when the defendant takes active steps to prevent the plaintiff from suing,
    Barry, 
    377 F.3d at 689
    , including concealing evidence needed to determine the viability of a
    claim. See 
    id. at 689
    ; Cada, 920 F.2d at 421. The district court, however, properly deemed
    equitable estoppel inapplicable because Smith did not plead that the company deceived
    him. Although Smith’s response brief offers such an account, the court correctly disregarded
    that new account because the response brief paints a narrative different than that alleged in
    his complaint. See Car Carriers, Inc. v. Ford Motor Co., 
    745 F.2d 1101
    , 1107 (7th Cir. 1984).
    Last Smith argues that, even if his complaint was deficient, the district court should
    have granted him leave to amend under Federal Rule of Civil Procedure 15. Rule 15
    ordinarily requires that leave to amend be granted at least once when there is a potentially
    curable problem with the complaint. See Bausch v. Stryker Corp., 
    630 F.3d 546
    , 562 (7th Cir.
    2010). In this regard, Smith contends that the factual assertions advanced in his response
    brief would trigger the discovery rule and establish equitable estoppel, curing the problem
    of untimeliness.
    No. 11-2750                                                                                Page 3
    Before litigating an unlawful employment practice under the ADA, an employee
    must file a timely charge of discrimination with the EEOC. See 42 U.S.C. § 2000e-5(e)(1),
    incorporated by 
    42 U.S.C. § 12117
    (a); Stepney v. Naperville Sch. Dist. 203, 
    392 F.3d 236
    , 239 (7th
    Cir. 2004). A plaintiff must file a charge within 300 days “after the alleged unlawful
    employment practice occurred.” Chaudhry v. Nucor Steel-Indiana, 
    546 F.3d 832
     (7th Cir. 2008).
    The discovery rule postpones the beginning of the limitations period to the date when the
    plaintiff discovers or should have discovered that he has been injured. Barry Aviation Inc. v.
    Land O'Lakes Mun. Airport Com'n, 
    377 F.3d 682
    , 688-89 (7th Cir. 2004); Clark v. City of
    Braidwood, 
    318 F.3d 764
    , 767 (7th Cir. 2003).
    The district court correctly determined that the discovery rule did not excuse Smith’s
    untimelineness. As the court explained, the complaint says only that Smith discovered the
    refusal to reinstate in 2006 and did not file his charge until 2009, well after the 300-day filing
    period expired. See Chaudhry, 
    546 F.3d at 836
    . Given these allegations, the face of the
    complaint shows that the action is untimely. See United States v. Lewis, 
    411 F.3d 838
    , 842 (7th
    Cir. 2005). Although Smith advanced a new chronology in his response brief, the district
    court correctly disregarded that chronology because it differs from the account he pleaded,
    and he may not amend his complaint through the filing of a response brief. See Pirelli
    Armstrong Tire Corp. Retiree Med. Benefits Trust v. Walgreen Comp., 
    631 F.3d 436
    , 448 (7th Cir.
    2011); Help At Home Inc. v. Medical Capital, L.L.C., 
    260 F.3d 748
    , 752 (7th Cir. 2001).
    Smith next contends that district court erred in rejecting his argument that equitable
    estoppel extended the period during which he could file his charge. He contends that the
    company withheld medical records from him and required him to continue with treatment
    that the records revealed was unnecessary. Equitable estoppel suspends the running of the
    filing period when the defendant takes active steps to prevent the plaintiff from suing,
    Barry, 
    377 F.3d at 689
    , including concealing evidence needed to determine the viability of a
    claim. See 
    id. at 689
    ; Cada, 920 F.2d at 421. The district court, however, properly deemed
    equitable estoppel inapplicable because Smith did not plead that the company deceived
    him. Although Smith’s response brief offers such an account, the court correctly disregarded
    that new account because the response brief paints a narrative different than that alleged in
    his complaint. See Car Carriers, Inc. v. Ford Motor Co., 
    745 F.2d 1101
    , 1107 (7th Cir. 1984).
    Last Smith argues that, even if his complaint was deficient, the district court should
    have granted him leave to amend under Federal Rule of Civil Procedure 15. Rule 15
    ordinarily requires that leave to amend be granted at least once when there is a potentially
    curable problem with the complaint. See Bausch v. Stryker Corp., 
    630 F.3d 546
    , 562 (7th Cir.
    2010). In this regard, Smith contends that the factual assertions advanced in his response
    brief would trigger the discovery rule and establish equitable estoppel, curing the problem
    of untimeliness.
    No. 11-2750                                                                                Page 3
    Before litigating an unlawful employment practice under the ADA, an employee
    must file a timely charge of discrimination with the EEOC. See 42 U.S.C. § 2000e-5(e)(1),
    incorporated by 
    42 U.S.C. § 12117
    (a); Stepney v. Naperville Sch. Dist. 203, 
    392 F.3d 236
    , 239 (7th
    Cir. 2004). A plaintiff must file a charge within 300 days “after the alleged unlawful
    employment practice occurred.” Chaudhry v. Nucor Steel-Indiana, 
    546 F.3d 832
     (7th Cir. 2008).
    The discovery rule postpones the beginning of the limitations period to the date when the
    plaintiff discovers or should have discovered that he has been injured. Barry Aviation Inc. v.
    Land O'Lakes Mun. Airport Com'n, 
    377 F.3d 682
    , 688-89 (7th Cir. 2004); Clark v. City of
    Braidwood, 
    318 F.3d 764
    , 767 (7th Cir. 2003).
    The district court correctly determined that the discovery rule did not excuse Smith’s
    untimelineness. As the court explained, the complaint says only that Smith discovered the
    refusal to reinstate in 2006 and did not file his charge until 2009, well after the 300-day filing
    period expired. See Chaudhry, 
    546 F.3d at 836
    . Given these allegations, the face of the
    complaint shows that the action is untimely. See United States v. Lewis, 
    411 F.3d 838
    , 842 (7th
    Cir. 2005). Although Smith advanced a new chronology in his response brief, the district
    court correctly disregarded that chronology because it differs from the account he pleaded,
    and he may not amend his complaint through the filing of a response brief. See Pirelli
    Armstrong Tire Corp. Retiree Med. Benefits Trust v. Walgreen Comp., 
    631 F.3d 436
    , 448 (7th Cir.
    2011); Help At Home Inc. v. Medical Capital, L.L.C., 
    260 F.3d 748
    , 752 (7th Cir. 2001).
    Smith next contends that district court erred in rejecting his argument that equitable
    estoppel extended the period during which he could file his charge. He contends that the
    company withheld medical records from him and required him to continue with treatment
    that the records revealed was unnecessary. Equitable estoppel suspends the running of the
    filing period when the defendant takes active steps to prevent the plaintiff from suing,
    Barry, 
    377 F.3d at 689
    , including concealing evidence needed to determine the viability of a
    claim. See 
    id. at 689
    ; Cada, 920 F.2d at 421. The district court, however, properly deemed
    equitable estoppel inapplicable because Smith did not plead that the company deceived
    him. Although Smith’s response brief offers such an account, the court correctly disregarded
    that new account because the response brief paints a narrative different than that alleged in
    his complaint. See Car Carriers, Inc. v. Ford Motor Co., 
    745 F.2d 1101
    , 1107 (7th Cir. 1984).
    Last Smith argues that, even if his complaint was deficient, the district court should
    have granted him leave to amend under Federal Rule of Civil Procedure 15. Rule 15
    ordinarily requires that leave to amend be granted at least once when there is a potentially
    curable problem with the complaint. See Bausch v. Stryker Corp., 
    630 F.3d 546
    , 562 (7th Cir.
    2010). In this regard, Smith contends that the factual assertions advanced in his response
    brief would trigger the discovery rule and establish equitable estoppel, curing the problem
    of untimeliness.
    No. 11-2750                                                                                Page 3
    Before litigating an unlawful employment practice under the ADA, an employee
    must file a timely charge of discrimination with the EEOC. See 42 U.S.C. § 2000e-5(e)(1),
    incorporated by 
    42 U.S.C. § 12117
    (a); Stepney v. Naperville Sch. Dist. 203, 
    392 F.3d 236
    , 239 (7th
    Cir. 2004). A plaintiff must file a charge within 300 days “after the alleged unlawful
    employment practice occurred.” Chaudhry v. Nucor Steel-Indiana, 
    546 F.3d 832
     (7th Cir. 2008).
    The discovery rule postpones the beginning of the limitations period to the date when the
    plaintiff discovers or should have discovered that he has been injured. Barry Aviation Inc. v.
    Land O'Lakes Mun. Airport Com'n, 
    377 F.3d 682
    , 688-89 (7th Cir. 2004); Clark v. City of
    Braidwood, 
    318 F.3d 764
    , 767 (7th Cir. 2003).
    The district court correctly determined that the discovery rule did not excuse Smith’s
    untimelineness. As the court explained, the complaint says only that Smith discovered the
    refusal to reinstate in 2006 and did not file his charge until 2009, well after the 300-day filing
    period expired. See Chaudhry, 
    546 F.3d at 836
    . Given these allegations, the face of the
    complaint shows that the action is untimely. See United States v. Lewis, 
    411 F.3d 838
    , 842 (7th
    Cir. 2005). Although Smith advanced a new chronology in his response brief, the district
    court correctly disregarded that chronology because it differs from the account he pleaded,
    and he may not amend his complaint through the filing of a response brief. See Pirelli
    Armstrong Tire Corp. Retiree Med. Benefits Trust v. Walgreen Comp., 
    631 F.3d 436
    , 448 (7th Cir.
    2011); Help At Home Inc. v. Medical Capital, L.L.C., 
    260 F.3d 748
    , 752 (7th Cir. 2001).
    Smith next contends that district court erred in rejecting his argument that equitable
    estoppel extended the period during which he could file his charge. He contends that the
    company withheld medical records from him and required him to continue with treatment
    that the records revealed was unnecessary. Equitable estoppel suspends the running of the
    filing period when the defendant takes active steps to prevent the plaintiff from suing,
    Barry, 
    377 F.3d at 689
    , including concealing evidence needed to determine the viability of a
    claim. See 
    id. at 689
    ; Cada, 920 F.2d at 421. The district court, however, properly deemed
    equitable estoppel inapplicable because Smith did not plead that the company deceived
    him. Although Smith’s response brief offers such an account, the court correctly disregarded
    that new account because the response brief paints a narrative different than that alleged in
    his complaint. See Car Carriers, Inc. v. Ford Motor Co., 
    745 F.2d 1101
    , 1107 (7th Cir. 1984).
    Last Smith argues that, even if his complaint was deficient, the district court should
    have granted him leave to amend under Federal Rule of Civil Procedure 15. Rule 15
    ordinarily requires that leave to amend be granted at least once when there is a potentially
    curable problem with the complaint. See Bausch v. Stryker Corp., 
    630 F.3d 546
    , 562 (7th Cir.
    2010). In this regard, Smith contends that the factual assertions advanced in his response
    brief would trigger the discovery rule and establish equitable estoppel, curing the problem
    of untimeliness.
    No. 11-2750                                                                                Page 3
    Before litigating an unlawful employment practice under the ADA, an employee
    must file a timely charge of discrimination with the EEOC. See 42 U.S.C. § 2000e-5(e)(1),
    incorporated by 
    42 U.S.C. § 12117
    (a); Stepney v. Naperville Sch. Dist. 203, 
    392 F.3d 236
    , 239 (7th
    Cir. 2004). A plaintiff must file a charge within 300 days “after the alleged unlawful
    employment practice occurred.” Chaudhry v. Nucor Steel-Indiana, 
    546 F.3d 832
     (7th Cir. 2008).
    The discovery rule postpones the beginning of the limitations period to the date when the
    plaintiff discovers or should have discovered that he has been injured. Barry Aviation Inc. v.
    Land O'Lakes Mun. Airport Com'n, 
    377 F.3d 682
    , 688-89 (7th Cir. 2004); Clark v. City of
    Braidwood, 
    318 F.3d 764
    , 767 (7th Cir. 2003).
    The district court correctly determined that the discovery rule did not excuse Smith’s
    untimelineness. As the court explained, the complaint says only that Smith discovered the
    refusal to reinstate in 2006 and did not file his charge until 2009, well after the 300-day filing
    period expired. See Chaudhry, 
    546 F.3d at 836
    . Given these allegations, the face of the
    complaint shows that the action is untimely. See United States v. Lewis, 
    411 F.3d 838
    , 842 (7th
    Cir. 2005). Although Smith advanced a new chronology in his response brief, the district
    court correctly disregarded that chronology because it differs from the account he pleaded,
    and he may not amend his complaint through the filing of a response brief. See Pirelli
    Armstrong Tire Corp. Retiree Med. Benefits Trust v. Walgreen Comp., 
    631 F.3d 436
    , 448 (7th Cir.
    2011); Help At Home Inc. v. Medical Capital, L.L.C., 
    260 F.3d 748
    , 752 (7th Cir. 2001).
    Smith next contends that district court erred in rejecting his argument that equitable
    estoppel extended the period during which he could file his charge. He contends that the
    company withheld medical records from him and required him to continue with treatment
    that the records revealed was unnecessary. Equitable estoppel suspends the running of the
    filing period when the defendant takes active steps to prevent the plaintiff from suing,
    Barry, 
    377 F.3d at 689
    , including concealing evidence needed to determine the viability of a
    claim. See 
    id. at 689
    ; Cada, 920 F.2d at 421. The district court, however, properly deemed
    equitable estoppel inapplicable because Smith did not plead that the company deceived
    him. Although Smith’s response brief offers such an account, the court correctly disregarded
    that new account because the response brief paints a narrative different than that alleged in
    his complaint. See Car Carriers, Inc. v. Ford Motor Co., 
    745 F.2d 1101
    , 1107 (7th Cir. 1984).
    Last Smith argues that, even if his complaint was deficient, the district court should
    have granted him leave to amend under Federal Rule of Civil Procedure 15. Rule 15
    ordinarily requires that leave to amend be granted at least once when there is a potentially
    curable problem with the complaint. See Bausch v. Stryker Corp., 
    630 F.3d 546
    , 562 (7th Cir.
    2010). In this regard, Smith contends that the factual assertions advanced in his response
    brief would trigger the discovery rule and establish equitable estoppel, curing the problem
    of untimeliness.
    No. 11-2750                                                                              Page 4
    Although dismissal was proper, the district court should have dismissed the
    complaint without prejudice. We disfavor granting dismissal under Rule 12(b)(6) on
    grounds of untimeliness, see Doe v. GTE Corp., 
    347 F.3d 655
    , 657 (7th Cir. 2003); therefore
    when a plaintiff is presented with the affirmative defense by way of a Rule 12(b)(6) motion,
    the plaintiff is ordinarily entitled to at least one opportunity to cure the problem through
    amendment of the pleadings. See Foster v. DeLuca, 
    545 F.3d 582
    , 584 (7th Cir. 2008); Rudder v.
    Williams, 
    2012 WL 119589
    , *3 (D.C. Cir. Jan. 17, 2012); United States v. Corinthian Coll., 
    655 F.3d 984
    , 995 (9th Cir. 2011). In his response brief to the district court and in his briefing
    before us, Smith has advanced a chronology that, if marshaled in an amended complaint,
    may render his charge of discrimination timely. Facts raised for the first time in plaintiff’s
    opposition papers should be considered when determining whether to grant leave to amend
    or to dismiss the complaint with or without prejudice. Broam v. Bogan, 
    320 F.3d 1023
    , 1026
    n.2 (9th Cir. 2003). Moreover, Smith asserts, he discovered in 2009 that the company
    deceived him in 2006 into believing that it would return him to service after he completed
    an additional treatment program. From 2006 to 2010, the company required him to remain
    in that program, while concealing medical records from him which showed that additional
    treatment was not necessary. When he discovered the company’s deception, he filed a
    charge of discrimination. Taking these assertions as true, Smith’s contentions under the
    discovery rule and equitable estoppel are colorable, sufficient to pass the pleading stage. See
    Clark, 
    318 F.3d at 768
    ; Barry, 
    377 F.3d at 688
    ; Artis v. Hitachi Zosen, 
    967 F.2d 132
    , 1144 (7th
    Cir. 1992). The district court was required to consider this new chronology when gauging
    whether any deficiencies in the complaint could be cured. See Indep. Trust Corp. v. Stewart
    Info. Serv. Corp., 
    665 F.3d 930
    , 943-44 (7th Cir. 2012); Rodi v. S. New England Sch. of Law, 
    389 F.3d 5
    , 20 (1st Cir. 2004).
    We conclude that the district court properly dismissed the complaint. Dismissal,
    however, should have been without prejudice, so that Smith could amend his complaint by
    pleading the facts asserted in his response brief. Accordingly, we VACATE in part the
    district court’s order dismissing Smith’s suit with prejudice and REMAND for further
    proceedings consistent with this decision.
    No. 11-2750                                                                              Page 4
    Although dismissal was proper, the district court should have dismissed the
    complaint without prejudice. We disfavor granting dismissal under Rule 12(b)(6) on
    grounds of untimeliness, see Doe v. GTE Corp., 
    347 F.3d 655
    , 657 (7th Cir. 2003); therefore
    when a plaintiff is presented with the affirmative defense by way of a Rule 12(b)(6) motion,
    the plaintiff is ordinarily entitled to at least one opportunity to cure the problem through
    amendment of the pleadings. See Foster v. DeLuca, 
    545 F.3d 582
    , 584 (7th Cir. 2008); Rudder v.
    Williams, 
    2012 WL 119589
    , *3 (D.C. Cir. Jan. 17, 2012); United States v. Corinthian Coll., 
    655 F.3d 984
    , 995 (9th Cir. 2011). In his response brief to the district court and in his briefing
    before us, Smith has advanced a chronology that, if marshaled in an amended complaint,
    may render his charge of discrimination timely. Facts raised for the first time in plaintiff’s
    opposition papers should be considered when determining whether to grant leave to amend
    or to dismiss the complaint with or without prejudice. Broam v. Bogan, 
    320 F.3d 1023
    , 1026
    n.2 (9th Cir. 2003). Moreover, Smith asserts, he discovered in 2009 that the company
    deceived him in 2006 into believing that it would return him to service after he completed
    an additional treatment program. From 2006 to 2010, the company required him to remain
    in that program, while concealing medical records from him which showed that additional
    treatment was not necessary. When he discovered the company’s deception, he filed a
    charge of discrimination. Taking these assertions as true, Smith’s contentions under the
    discovery rule and equitable estoppel are colorable, sufficient to pass the pleading stage. See
    Clark, 
    318 F.3d at 768
    ; Barry, 
    377 F.3d at 688
    ; Artis v. Hitachi Zosen, 
    967 F.2d 132
    , 1144 (7th
    Cir. 1992). The district court was required to consider this new chronology when gauging
    whether any deficiencies in the complaint could be cured. See Indep. Trust Corp. v. Stewart
    Info. Serv. Corp., 
    665 F.3d 930
    , 943-44 (7th Cir. 2012); Rodi v. S. New England Sch. of Law, 
    389 F.3d 5
    , 20 (1st Cir. 2004).
    We conclude that the district court properly dismissed the complaint. Dismissal,
    however, should have been without prejudice, so that Smith could amend his complaint by
    pleading the facts asserted in his response brief. Accordingly, we VACATE in part the
    district court’s order dismissing Smith’s suit with prejudice and REMAND for further
    proceedings consistent with this decision.
    No. 11-2750                                                                              Page 4
    Although dismissal was proper, the district court should have dismissed the
    complaint without prejudice. We disfavor granting dismissal under Rule 12(b)(6) on
    grounds of untimeliness, see Doe v. GTE Corp., 
    347 F.3d 655
    , 657 (7th Cir. 2003); therefore
    when a plaintiff is presented with the affirmative defense by way of a Rule 12(b)(6) motion,
    the plaintiff is ordinarily entitled to at least one opportunity to cure the problem through
    amendment of the pleadings. See Foster v. DeLuca, 
    545 F.3d 582
    , 584 (7th Cir. 2008); Rudder v.
    Williams, 
    2012 WL 119589
    , *3 (D.C. Cir. Jan. 17, 2012); United States v. Corinthian Coll., 
    655 F.3d 984
    , 995 (9th Cir. 2011). In his response brief to the district court and in his briefing
    before us, Smith has advanced a chronology that, if marshaled in an amended complaint,
    may render his charge of discrimination timely. Facts raised for the first time in plaintiff’s
    opposition papers should be considered when determining whether to grant leave to amend
    or to dismiss the complaint with or without prejudice. Broam v. Bogan, 
    320 F.3d 1023
    , 1026
    n.2 (9th Cir. 2003). Moreover, Smith asserts, he discovered in 2009 that the company
    deceived him in 2006 into believing that it would return him to service after he completed
    an additional treatment program. From 2006 to 2010, the company required him to remain
    in that program, while concealing medical records from him which showed that additional
    treatment was not necessary. When he discovered the company’s deception, he filed a
    charge of discrimination. Taking these assertions as true, Smith’s contentions under the
    discovery rule and equitable estoppel are colorable, sufficient to pass the pleading stage. See
    Clark, 
    318 F.3d at 768
    ; Barry, 
    377 F.3d at 688
    ; Artis v. Hitachi Zosen, 
    967 F.2d 132
    , 1144 (7th
    Cir. 1992). The district court was required to consider this new chronology when gauging
    whether any deficiencies in the complaint could be cured. See Indep. Trust Corp. v. Stewart
    Info. Serv. Corp., 
    665 F.3d 930
    , 943-44 (7th Cir. 2012); Rodi v. S. New England Sch. of Law, 
    389 F.3d 5
    , 20 (1st Cir. 2004).
    We conclude that the district court properly dismissed the complaint. Dismissal,
    however, should have been without prejudice, so that Smith could amend his complaint by
    pleading the facts asserted in his response brief. Accordingly, we VACATE in part the
    district court’s order dismissing Smith’s suit with prejudice and REMAND for further
    proceedings consistent with this decision.
    No. 11-2750                                                                              Page 4
    Although dismissal was proper, the district court should have dismissed the
    complaint without prejudice. We disfavor granting dismissal under Rule 12(b)(6) on
    grounds of untimeliness, see Doe v. GTE Corp., 
    347 F.3d 655
    , 657 (7th Cir. 2003); therefore
    when a plaintiff is presented with the affirmative defense by way of a Rule 12(b)(6) motion,
    the plaintiff is ordinarily entitled to at least one opportunity to cure the problem through
    amendment of the pleadings. See Foster v. DeLuca, 
    545 F.3d 582
    , 584 (7th Cir. 2008); Rudder v.
    Williams, 
    2012 WL 119589
    , *3 (D.C. Cir. Jan. 17, 2012); United States v. Corinthian Coll., 
    655 F.3d 984
    , 995 (9th Cir. 2011). In his response brief to the district court and in his briefing
    before us, Smith has advanced a chronology that, if marshaled in an amended complaint,
    may render his charge of discrimination timely. Facts raised for the first time in plaintiff’s
    opposition papers should be considered when determining whether to grant leave to amend
    or to dismiss the complaint with or without prejudice. Broam v. Bogan, 
    320 F.3d 1023
    , 1026
    n.2 (9th Cir. 2003). Moreover, Smith asserts, he discovered in 2009 that the company
    deceived him in 2006 into believing that it would return him to service after he completed
    an additional treatment program. From 2006 to 2010, the company required him to remain
    in that program, while concealing medical records from him which showed that additional
    treatment was not necessary. When he discovered the company’s deception, he filed a
    charge of discrimination. Taking these assertions as true, Smith’s contentions under the
    discovery rule and equitable estoppel are colorable, sufficient to pass the pleading stage. See
    Clark, 
    318 F.3d at 768
    ; Barry, 
    377 F.3d at 688
    ; Artis v. Hitachi Zosen, 
    967 F.2d 132
    , 1144 (7th
    Cir. 1992). The district court was required to consider this new chronology when gauging
    whether any deficiencies in the complaint could be cured. See Indep. Trust Corp. v. Stewart
    Info. Serv. Corp., 
    665 F.3d 930
    , 943-44 (7th Cir. 2012); Rodi v. S. New England Sch. of Law, 
    389 F.3d 5
    , 20 (1st Cir. 2004).
    We conclude that the district court properly dismissed the complaint. Dismissal,
    however, should have been without prejudice, so that Smith could amend his complaint by
    pleading the facts asserted in his response brief. Accordingly, we VACATE in part the
    district court’s order dismissing Smith’s suit with prejudice and REMAND for further
    proceedings consistent with this decision.
    No. 11-2750                                                                              Page 4
    Although dismissal was proper, the district court should have dismissed the
    complaint without prejudice. We disfavor granting dismissal under Rule 12(b)(6) on
    grounds of untimeliness, see Doe v. GTE Corp., 
    347 F.3d 655
    , 657 (7th Cir. 2003); therefore
    when a plaintiff is presented with the affirmative defense by way of a Rule 12(b)(6) motion,
    the plaintiff is ordinarily entitled to at least one opportunity to cure the problem through
    amendment of the pleadings. See Foster v. DeLuca, 
    545 F.3d 582
    , 584 (7th Cir. 2008); Rudder v.
    Williams, 
    2012 WL 119589
    , *3 (D.C. Cir. Jan. 17, 2012); United States v. Corinthian Coll., 
    655 F.3d 984
    , 995 (9th Cir. 2011). In his response brief to the district court and in his briefing
    before us, Smith has advanced a chronology that, if marshaled in an amended complaint,
    may render his charge of discrimination timely. Facts raised for the first time in plaintiff’s
    opposition papers should be considered when determining whether to grant leave to amend
    or to dismiss the complaint with or without prejudice. Broam v. Bogan, 
    320 F.3d 1023
    , 1026
    n.2 (9th Cir. 2003). Moreover, Smith asserts, he discovered in 2009 that the company
    deceived him in 2006 into believing that it would return him to service after he completed
    an additional treatment program. From 2006 to 2010, the company required him to remain
    in that program, while concealing medical records from him which showed that additional
    treatment was not necessary. When he discovered the company’s deception, he filed a
    charge of discrimination. Taking these assertions as true, Smith’s contentions under the
    discovery rule and equitable estoppel are colorable, sufficient to pass the pleading stage. See
    Clark, 
    318 F.3d at 768
    ; Barry, 
    377 F.3d at 688
    ; Artis v. Hitachi Zosen, 
    967 F.2d 132
    , 1144 (7th
    Cir. 1992). The district court was required to consider this new chronology when gauging
    whether any deficiencies in the complaint could be cured. See Indep. Trust Corp. v. Stewart
    Info. Serv. Corp., 
    665 F.3d 930
    , 943-44 (7th Cir. 2012); Rodi v. S. New England Sch. of Law, 
    389 F.3d 5
    , 20 (1st Cir. 2004).
    We conclude that the district court properly dismissed the complaint. Dismissal,
    however, should have been without prejudice, so that Smith could amend his complaint by
    pleading the facts asserted in his response brief. Accordingly, we VACATE in part the
    district court’s order dismissing Smith’s suit with prejudice and REMAND for further
    proceedings consistent with this decision.
    No. 11-2750                                                                              Page 4
    Although dismissal was proper, the district court should have dismissed the
    complaint without prejudice. We disfavor granting dismissal under Rule 12(b)(6) on
    grounds of untimeliness, see Doe v. GTE Corp., 
    347 F.3d 655
    , 657 (7th Cir. 2003); therefore
    when a plaintiff is presented with the affirmative defense by way of a Rule 12(b)(6) motion,
    the plaintiff is ordinarily entitled to at least one opportunity to cure the problem through
    amendment of the pleadings. See Foster v. DeLuca, 
    545 F.3d 582
    , 584 (7th Cir. 2008); Rudder v.
    Williams, 
    2012 WL 119589
    , *3 (D.C. Cir. Jan. 17, 2012); United States v. Corinthian Coll., 
    655 F.3d 984
    , 995 (9th Cir. 2011). In his response brief to the district court and in his briefing
    before us, Smith has advanced a chronology that, if marshaled in an amended complaint,
    may render his charge of discrimination timely. Facts raised for the first time in plaintiff’s
    opposition papers should be considered when determining whether to grant leave to amend
    or to dismiss the complaint with or without prejudice. Broam v. Bogan, 
    320 F.3d 1023
    , 1026
    n.2 (9th Cir. 2003). Moreover, Smith asserts, he discovered in 2009 that the company
    deceived him in 2006 into believing that it would return him to service after he completed
    an additional treatment program. From 2006 to 2010, the company required him to remain
    in that program, while concealing medical records from him which showed that additional
    treatment was not necessary. When he discovered the company’s deception, he filed a
    charge of discrimination. Taking these assertions as true, Smith’s contentions under the
    discovery rule and equitable estoppel are colorable, sufficient to pass the pleading stage. See
    Clark, 
    318 F.3d at 768
    ; Barry, 
    377 F.3d at 688
    ; Artis v. Hitachi Zosen, 
    967 F.2d 132
    , 1144 (7th
    Cir. 1992). The district court was required to consider this new chronology when gauging
    whether any deficiencies in the complaint could be cured. See Indep. Trust Corp. v. Stewart
    Info. Serv. Corp., 
    665 F.3d 930
    , 943-44 (7th Cir. 2012); Rodi v. S. New England Sch. of Law, 
    389 F.3d 5
    , 20 (1st Cir. 2004).
    We conclude that the district court properly dismissed the complaint. Dismissal,
    however, should have been without prejudice, so that Smith could amend his complaint by
    pleading the facts asserted in his response brief. Accordingly, we VACATE in part the
    district court’s order dismissing Smith’s suit with prejudice and REMAND for further
    proceedings consistent with this decision.
    No. 11-2750                                                                              Page 4
    Although dismissal was proper, the district court should have dismissed the
    complaint without prejudice. We disfavor granting dismissal under Rule 12(b)(6) on
    grounds of untimeliness, see Doe v. GTE Corp., 
    347 F.3d 655
    , 657 (7th Cir. 2003); therefore
    when a plaintiff is presented with the affirmative defense by way of a Rule 12(b)(6) motion,
    the plaintiff is ordinarily entitled to at least one opportunity to cure the problem through
    amendment of the pleadings. See Foster v. DeLuca, 
    545 F.3d 582
    , 584 (7th Cir. 2008); Rudder v.
    Williams, 
    2012 WL 119589
    , *3 (D.C. Cir. Jan. 17, 2012); United States v. Corinthian Coll., 
    655 F.3d 984
    , 995 (9th Cir. 2011). In his response brief to the district court and in his briefing
    before us, Smith has advanced a chronology that, if marshaled in an amended complaint,
    may render his charge of discrimination timely. Facts raised for the first time in plaintiff’s
    opposition papers should be considered when determining whether to grant leave to amend
    or to dismiss the complaint with or without prejudice. Broam v. Bogan, 
    320 F.3d 1023
    , 1026
    n.2 (9th Cir. 2003). Moreover, Smith asserts, he discovered in 2009 that the company
    deceived him in 2006 into believing that it would return him to service after he completed
    an additional treatment program. From 2006 to 2010, the company required him to remain
    in that program, while concealing medical records from him which showed that additional
    treatment was not necessary. When he discovered the company’s deception, he filed a
    charge of discrimination. Taking these assertions as true, Smith’s contentions under the
    discovery rule and equitable estoppel are colorable, sufficient to pass the pleading stage. See
    Clark, 
    318 F.3d at 768
    ; Barry, 
    377 F.3d at 688
    ; Artis v. Hitachi Zosen, 
    967 F.2d 132
    , 1144 (7th
    Cir. 1992). The district court was required to consider this new chronology when gauging
    whether any deficiencies in the complaint could be cured. See Indep. Trust Corp. v. Stewart
    Info. Serv. Corp., 
    665 F.3d 930
    , 943-44 (7th Cir. 2012); Rodi v. S. New England Sch. of Law, 
    389 F.3d 5
    , 20 (1st Cir. 2004).
    We conclude that the district court properly dismissed the complaint. Dismissal,
    however, should have been without prejudice, so that Smith could amend his complaint by
    pleading the facts asserted in his response brief. Accordingly, we VACATE in part the
    district court’s order dismissing Smith’s suit with prejudice and REMAND for further
    proceedings consistent with this decision.
    No. 11-2750                                                                              Page 4
    Although dismissal was proper, the district court should have dismissed the
    complaint without prejudice. We disfavor granting dismissal under Rule 12(b)(6) on
    grounds of untimeliness, see Doe v. GTE Corp., 
    347 F.3d 655
    , 657 (7th Cir. 2003); therefore
    when a plaintiff is presented with the affirmative defense by way of a Rule 12(b)(6) motion,
    the plaintiff is ordinarily entitled to at least one opportunity to cure the problem through
    amendment of the pleadings. See Foster v. DeLuca, 
    545 F.3d 582
    , 584 (7th Cir. 2008); Rudder v.
    Williams, 
    2012 WL 119589
    , *3 (D.C. Cir. Jan. 17, 2012); United States v. Corinthian Coll., 
    655 F.3d 984
    , 995 (9th Cir. 2011). In his response brief to the district court and in his briefing
    before us, Smith has advanced a chronology that, if marshaled in an amended complaint,
    may render his charge of discrimination timely. Facts raised for the first time in plaintiff’s
    opposition papers should be considered when determining whether to grant leave to amend
    or to dismiss the complaint with or without prejudice. Broam v. Bogan, 
    320 F.3d 1023
    , 1026
    n.2 (9th Cir. 2003). Moreover, Smith asserts, he discovered in 2009 that the company
    deceived him in 2006 into believing that it would return him to service after he completed
    an additional treatment program. From 2006 to 2010, the company required him to remain
    in that program, while concealing medical records from him which showed that additional
    treatment was not necessary. When he discovered the company’s deception, he filed a
    charge of discrimination. Taking these assertions as true, Smith’s contentions under the
    discovery rule and equitable estoppel are colorable, sufficient to pass the pleading stage. See
    Clark, 
    318 F.3d at 768
    ; Barry, 
    377 F.3d at 688
    ; Artis v. Hitachi Zosen, 
    967 F.2d 132
    , 1144 (7th
    Cir. 1992). The district court was required to consider this new chronology when gauging
    whether any deficiencies in the complaint could be cured. See Indep. Trust Corp. v. Stewart
    Info. Serv. Corp., 
    665 F.3d 930
    , 943-44 (7th Cir. 2012); Rodi v. S. New England Sch. of Law, 
    389 F.3d 5
    , 20 (1st Cir. 2004).
    We conclude that the district court properly dismissed the complaint. Dismissal,
    however, should have been without prejudice, so that Smith could amend his complaint by
    pleading the facts asserted in his response brief. Accordingly, we VACATE in part the
    district court’s order dismissing Smith’s suit with prejudice and REMAND for further
    proceedings consistent with this decision.
    No. 11-2750                                                                              Page 4
    Although dismissal was proper, the district court should have dismissed the
    complaint without prejudice. We disfavor granting dismissal under Rule 12(b)(6) on
    grounds of untimeliness, see Doe v. GTE Corp., 
    347 F.3d 655
    , 657 (7th Cir. 2003); therefore
    when a plaintiff is presented with the affirmative defense by way of a Rule 12(b)(6) motion,
    the plaintiff is ordinarily entitled to at least one opportunity to cure the problem through
    amendment of the pleadings. See Foster v. DeLuca, 
    545 F.3d 582
    , 584 (7th Cir. 2008); Rudder v.
    Williams, 
    2012 WL 119589
    , *3 (D.C. Cir. Jan. 17, 2012); United States v. Corinthian Coll., 
    655 F.3d 984
    , 995 (9th Cir. 2011). In his response brief to the district court and in his briefing
    before us, Smith has advanced a chronology that, if marshaled in an amended complaint,
    may render his charge of discrimination timely. Facts raised for the first time in plaintiff’s
    opposition papers should be considered when determining whether to grant leave to amend
    or to dismiss the complaint with or without prejudice. Broam v. Bogan, 
    320 F.3d 1023
    , 1026
    n.2 (9th Cir. 2003). Moreover, Smith asserts, he discovered in 2009 that the company
    deceived him in 2006 into believing that it would return him to service after he completed
    an additional treatment program. From 2006 to 2010, the company required him to remain
    in that program, while concealing medical records from him which showed that additional
    treatment was not necessary. When he discovered the company’s deception, he filed a
    charge of discrimination. Taking these assertions as true, Smith’s contentions under the
    discovery rule and equitable estoppel are colorable, sufficient to pass the pleading stage. See
    Clark, 
    318 F.3d at 768
    ; Barry, 
    377 F.3d at 688
    ; Artis v. Hitachi Zosen, 
    967 F.2d 132
    , 1144 (7th
    Cir. 1992). The district court was required to consider this new chronology when gauging
    whether any deficiencies in the complaint could be cured. See Indep. Trust Corp. v. Stewart
    Info. Serv. Corp., 
    665 F.3d 930
    , 943-44 (7th Cir. 2012); Rodi v. S. New England Sch. of Law, 
    389 F.3d 5
    , 20 (1st Cir. 2004).
    We conclude that the district court properly dismissed the complaint. Dismissal,
    however, should have been without prejudice, so that Smith could amend his complaint by
    pleading the facts asserted in his response brief. Accordingly, we VACATE in part the
    district court’s order dismissing Smith’s suit with prejudice and REMAND for further
    proceedings consistent with this decision.
    No. 11-2750                                                                              Page 4
    Although dismissal was proper, the district court should have dismissed the
    complaint without prejudice. We disfavor granting dismissal under Rule 12(b)(6) on
    grounds of untimeliness, see Doe v. GTE Corp., 
    347 F.3d 655
    , 657 (7th Cir. 2003); therefore
    when a plaintiff is presented with the affirmative defense by way of a Rule 12(b)(6) motion,
    the plaintiff is ordinarily entitled to at least one opportunity to cure the problem through
    amendment of the pleadings. See Foster v. DeLuca, 
    545 F.3d 582
    , 584 (7th Cir. 2008); Rudder v.
    Williams, 
    2012 WL 119589
    , *3 (D.C. Cir. Jan. 17, 2012); United States v. Corinthian Coll., 
    655 F.3d 984
    , 995 (9th Cir. 2011). In his response brief to the district court and in his briefing
    before us, Smith has advanced a chronology that, if marshaled in an amended complaint,
    may render his charge of discrimination timely. Facts raised for the first time in plaintiff’s
    opposition papers should be considered when determining whether to grant leave to amend
    or to dismiss the complaint with or without prejudice. Broam v. Bogan, 
    320 F.3d 1023
    , 1026
    n.2 (9th Cir. 2003). Moreover, Smith asserts, he discovered in 2009 that the company
    deceived him in 2006 into believing that it would return him to service after he completed
    an additional treatment program. From 2006 to 2010, the company required him to remain
    in that program, while concealing medical records from him which showed that additional
    treatment was not necessary. When he discovered the company’s deception, he filed a
    charge of discrimination. Taking these assertions as true, Smith’s contentions under the
    discovery rule and equitable estoppel are colorable, sufficient to pass the pleading stage. See
    Clark, 
    318 F.3d at 768
    ; Barry, 
    377 F.3d at 688
    ; Artis v. Hitachi Zosen, 
    967 F.2d 132
    , 1144 (7th
    Cir. 1992). The district court was required to consider this new chronology when gauging
    whether any deficiencies in the complaint could be cured. See Indep. Trust Corp. v. Stewart
    Info. Serv. Corp., 
    665 F.3d 930
    , 943-44 (7th Cir. 2012); Rodi v. S. New England Sch. of Law, 
    389 F.3d 5
    , 20 (1st Cir. 2004).
    We conclude that the district court properly dismissed the complaint. Dismissal,
    however, should have been without prejudice, so that Smith could amend his complaint by
    pleading the facts asserted in his response brief. Accordingly, we VACATE in part the
    district court’s order dismissing Smith’s suit with prejudice and REMAND for further
    proceedings consistent with this decision.
    No. 11-2750                                                                              Page 4
    Although dismissal was proper, the district court should have dismissed the
    complaint without prejudice. We disfavor granting dismissal under Rule 12(b)(6) on
    grounds of untimeliness, see Doe v. GTE Corp., 
    347 F.3d 655
    , 657 (7th Cir. 2003); therefore
    when a plaintiff is presented with the affirmative defense by way of a Rule 12(b)(6) motion,
    the plaintiff is ordinarily entitled to at least one opportunity to cure the problem through
    amendment of the pleadings. See Foster v. DeLuca, 
    545 F.3d 582
    , 584 (7th Cir. 2008); Rudder v.
    Williams, 
    2012 WL 119589
    , *3 (D.C. Cir. Jan. 17, 2012); United States v. Corinthian Coll., 
    655 F.3d 984
    , 995 (9th Cir. 2011). In his response brief to the district court and in his briefing
    before us, Smith has advanced a chronology that, if marshaled in an amended complaint,
    may render his charge of discrimination timely. Facts raised for the first time in plaintiff’s
    opposition papers should be considered when determining whether to grant leave to amend
    or to dismiss the complaint with or without prejudice. Broam v. Bogan, 
    320 F.3d 1023
    , 1026
    n.2 (9th Cir. 2003). Moreover, Smith asserts, he discovered in 2009 that the company
    deceived him in 2006 into believing that it would return him to service after he completed
    an additional treatment program. From 2006 to 2010, the company required him to remain
    in that program, while concealing medical records from him which showed that additional
    treatment was not necessary. When he discovered the company’s deception, he filed a
    charge of discrimination. Taking these assertions as true, Smith’s contentions under the
    discovery rule and equitable estoppel are colorable, sufficient to pass the pleading stage. See
    Clark, 
    318 F.3d at 768
    ; Barry, 
    377 F.3d at 688
    ; Artis v. Hitachi Zosen, 
    967 F.2d 132
    , 1144 (7th
    Cir. 1992). The district court was required to consider this new chronology when gauging
    whether any deficiencies in the complaint could be cured. See Indep. Trust Corp. v. Stewart
    Info. Serv. Corp., 
    665 F.3d 930
    , 943-44 (7th Cir. 2012); Rodi v. S. New England Sch. of Law, 
    389 F.3d 5
    , 20 (1st Cir. 2004).
    We conclude that the district court properly dismissed the complaint. Dismissal,
    however, should have been without prejudice, so that Smith could amend his complaint by
    pleading the facts asserted in his response brief. Accordingly, we VACATE in part the
    district court’s order dismissing Smith’s suit with prejudice and REMAND for further
    proceedings consistent with this decision.
    No. 11-2750                                                                              Page 4
    Although dismissal was proper, the district court should have dismissed the
    complaint without prejudice. We disfavor granting dismissal under Rule 12(b)(6) on
    grounds of untimeliness, see Doe v. GTE Corp., 
    347 F.3d 655
    , 657 (7th Cir. 2003); therefore
    when a plaintiff is presented with the affirmative defense by way of a Rule 12(b)(6) motion,
    the plaintiff is ordinarily entitled to at least one opportunity to cure the problem through
    amendment of the pleadings. See Foster v. DeLuca, 
    545 F.3d 582
    , 584 (7th Cir. 2008); Rudder v.
    Williams, 
    2012 WL 119589
    , *3 (D.C. Cir. Jan. 17, 2012); United States v. Corinthian Coll., 
    655 F.3d 984
    , 995 (9th Cir. 2011). In his response brief to the district court and in his briefing
    before us, Smith has advanced a chronology that, if marshaled in an amended complaint,
    may render his charge of discrimination timely. Facts raised for the first time in plaintiff’s
    opposition papers should be considered when determining whether to grant leave to amend
    or to dismiss the complaint with or without prejudice. Broam v. Bogan, 
    320 F.3d 1023
    , 1026
    n.2 (9th Cir. 2003). Moreover, Smith asserts, he discovered in 2009 that the company
    deceived him in 2006 into believing that it would return him to service after he completed
    an additional treatment program. From 2006 to 2010, the company required him to remain
    in that program, while concealing medical records from him which showed that additional
    treatment was not necessary. When he discovered the company’s deception, he filed a
    charge of discrimination. Taking these assertions as true, Smith’s contentions under the
    discovery rule and equitable estoppel are colorable, sufficient to pass the pleading stage. See
    Clark, 
    318 F.3d at 768
    ; Barry, 
    377 F.3d at 688
    ; Artis v. Hitachi Zosen, 
    967 F.2d 132
    , 1144 (7th
    Cir. 1992). The district court was required to consider this new chronology when gauging
    whether any deficiencies in the complaint could be cured. See Indep. Trust Corp. v. Stewart
    Info. Serv. Corp., 
    665 F.3d 930
    , 943-44 (7th Cir. 2012); Rodi v. S. New England Sch. of Law, 
    389 F.3d 5
    , 20 (1st Cir. 2004).
    We conclude that the district court properly dismissed the complaint. Dismissal,
    however, should have been without prejudice, so that Smith could amend his complaint by
    pleading the facts asserted in his response brief. Accordingly, we VACATE in part the
    district court’s order dismissing Smith’s suit with prejudice and REMAND for further
    proceedings consistent with this decision.
    No. 11-2750                                                                              Page 4
    Although dismissal was proper, the district court should have dismissed the
    complaint without prejudice. We disfavor granting dismissal under Rule 12(b)(6) on
    grounds of untimeliness, see Doe v. GTE Corp., 
    347 F.3d 655
    , 657 (7th Cir. 2003); therefore
    when a plaintiff is presented with the affirmative defense by way of a Rule 12(b)(6) motion,
    the plaintiff is ordinarily entitled to at least one opportunity to cure the problem through
    amendment of the pleadings. See Foster v. DeLuca, 
    545 F.3d 582
    , 584 (7th Cir. 2008); Rudder v.
    Williams, 
    2012 WL 119589
    , *3 (D.C. Cir. Jan. 17, 2012); United States v. Corinthian Coll., 
    655 F.3d 984
    , 995 (9th Cir. 2011). In his response brief to the district court and in his briefing
    before us, Smith has advanced a chronology that, if marshaled in an amended complaint,
    may render his charge of discrimination timely. Facts raised for the first time in plaintiff’s
    opposition papers should be considered when determining whether to grant leave to amend
    or to dismiss the complaint with or without prejudice. Broam v. Bogan, 
    320 F.3d 1023
    , 1026
    n.2 (9th Cir. 2003). Moreover, Smith asserts, he discovered in 2009 that the company
    deceived him in 2006 into believing that it would return him to service after he completed
    an additional treatment program. From 2006 to 2010, the company required him to remain
    in that program, while concealing medical records from him which showed that additional
    treatment was not necessary. When he discovered the company’s deception, he filed a
    charge of discrimination. Taking these assertions as true, Smith’s contentions under the
    discovery rule and equitable estoppel are colorable, sufficient to pass the pleading stage. See
    Clark, 
    318 F.3d at 768
    ; Barry, 
    377 F.3d at 688
    ; Artis v. Hitachi Zosen, 
    967 F.2d 132
    , 1144 (7th
    Cir. 1992). The district court was required to consider this new chronology when gauging
    whether any deficiencies in the complaint could be cured. See Indep. Trust Corp. v. Stewart
    Info. Serv. Corp., 
    665 F.3d 930
    , 943-44 (7th Cir. 2012); Rodi v. S. New England Sch. of Law, 
    389 F.3d 5
    , 20 (1st Cir. 2004).
    We conclude that the district court properly dismissed the complaint. Dismissal,
    however, should have been without prejudice, so that Smith could amend his complaint by
    pleading the facts asserted in his response brief. Accordingly, we VACATE in part the
    district court’s order dismissing Smith’s suit with prejudice and REMAND for further
    proceedings consistent with this decision.
    No. 11-2750                                                                              Page 4
    Although dismissal was proper, the district court should have dismissed the
    complaint without prejudice. We disfavor granting dismissal under Rule 12(b)(6) on
    grounds of untimeliness, see Doe v. GTE Corp., 
    347 F.3d 655
    , 657 (7th Cir. 2003); therefore
    when a plaintiff is presented with the affirmative defense by way of a Rule 12(b)(6) motion,
    the plaintiff is ordinarily entitled to at least one opportunity to cure the problem through
    amendment of the pleadings. See Foster v. DeLuca, 
    545 F.3d 582
    , 584 (7th Cir. 2008); Rudder v.
    Williams, 
    2012 WL 119589
    , *3 (D.C. Cir. Jan. 17, 2012); United States v. Corinthian Coll., 
    655 F.3d 984
    , 995 (9th Cir. 2011). In his response brief to the district court and in his briefing
    before us, Smith has advanced a chronology that, if marshaled in an amended complaint,
    may render his charge of discrimination timely. Facts raised for the first time in plaintiff’s
    opposition papers should be considered when determining whether to grant leave to amend
    or to dismiss the complaint with or without prejudice. Broam v. Bogan, 
    320 F.3d 1023
    , 1026
    n.2 (9th Cir. 2003). Moreover, Smith asserts, he discovered in 2009 that the company
    deceived him in 2006 into believing that it would return him to service after he completed
    an additional treatment program. From 2006 to 2010, the company required him to remain
    in that program, while concealing medical records from him which showed that additional
    treatment was not necessary. When he discovered the company’s deception, he filed a
    charge of discrimination. Taking these assertions as true, Smith’s contentions under the
    discovery rule and equitable estoppel are colorable, sufficient to pass the pleading stage. See
    Clark, 
    318 F.3d at 768
    ; Barry, 
    377 F.3d at 688
    ; Artis v. Hitachi Zosen, 
    967 F.2d 132
    , 1144 (7th
    Cir. 1992). The district court was required to consider this new chronology when gauging
    whether any deficiencies in the complaint could be cured. See Indep. Trust Corp. v. Stewart
    Info. Serv. Corp., 
    665 F.3d 930
    , 943-44 (7th Cir. 2012); Rodi v. S. New England Sch. of Law, 
    389 F.3d 5
    , 20 (1st Cir. 2004).
    We conclude that the district court properly dismissed the complaint. Dismissal,
    however, should have been without prejudice, so that Smith could amend his complaint by
    pleading the facts asserted in his response brief. Accordingly, we VACATE in part the
    district court’s order dismissing Smith’s suit with prejudice and REMAND for further
    proceedings consistent with this decision.
    No. 11-2750                                                                              Page 4
    Although dismissal was proper, the district court should have dismissed the
    complaint without prejudice. We disfavor granting dismissal under Rule 12(b)(6) on
    grounds of untimeliness, see Doe v. GTE Corp., 
    347 F.3d 655
    , 657 (7th Cir. 2003); therefore
    when a plaintiff is presented with the affirmative defense by way of a Rule 12(b)(6) motion,
    the plaintiff is ordinarily entitled to at least one opportunity to cure the problem through
    amendment of the pleadings. See Foster v. DeLuca, 
    545 F.3d 582
    , 584 (7th Cir. 2008); Rudder v.
    Williams, 
    2012 WL 119589
    , *3 (D.C. Cir. Jan. 17, 2012); United States v. Corinthian Coll., 
    655 F.3d 984
    , 995 (9th Cir. 2011). In his response brief to the district court and in his briefing
    before us, Smith has advanced a chronology that, if marshaled in an amended complaint,
    may render his charge of discrimination timely. Facts raised for the first time in plaintiff’s
    opposition papers should be considered when determining whether to grant leave to amend
    or to dismiss the complaint with or without prejudice. Broam v. Bogan, 
    320 F.3d 1023
    , 1026
    n.2 (9th Cir. 2003). Moreover, Smith asserts, he discovered in 2009 that the company
    deceived him in 2006 into believing that it would return him to service after he completed
    an additional treatment program. From 2006 to 2010, the company required him to remain
    in that program, while concealing medical records from him which showed that additional
    treatment was not necessary. When he discovered the company’s deception, he filed a
    charge of discrimination. Taking these assertions as true, Smith’s contentions under the
    discovery rule and equitable estoppel are colorable, sufficient to pass the pleading stage. See
    Clark, 
    318 F.3d at 768
    ; Barry, 
    377 F.3d at 688
    ; Artis v. Hitachi Zosen, 
    967 F.2d 132
    , 1144 (7th
    Cir. 1992). The district court was required to consider this new chronology when gauging
    whether any deficiencies in the complaint could be cured. See Indep. Trust Corp. v. Stewart
    Info. Serv. Corp., 
    665 F.3d 930
    , 943-44 (7th Cir. 2012); Rodi v. S. New England Sch. of Law, 
    389 F.3d 5
    , 20 (1st Cir. 2004).
    We conclude that the district court properly dismissed the complaint. Dismissal,
    however, should have been without prejudice, so that Smith could amend his complaint by
    pleading the facts asserted in his response brief. Accordingly, we VACATE in part the
    district court’s order dismissing Smith’s suit with prejudice and REMAND for further
    proceedings consistent with this decision.
    No. 11-2750                                                                              Page 4
    Although dismissal was proper, the district court should have dismissed the
    complaint without prejudice. We disfavor granting dismissal under Rule 12(b)(6) on
    grounds of untimeliness, see Doe v. GTE Corp., 
    347 F.3d 655
    , 657 (7th Cir. 2003); therefore
    when a plaintiff is presented with the affirmative defense by way of a Rule 12(b)(6) motion,
    the plaintiff is ordinarily entitled to at least one opportunity to cure the problem through
    amendment of the pleadings. See Foster v. DeLuca, 
    545 F.3d 582
    , 584 (7th Cir. 2008); Rudder v.
    Williams, 
    2012 WL 119589
    , *3 (D.C. Cir. Jan. 17, 2012); United States v. Corinthian Coll., 
    655 F.3d 984
    , 995 (9th Cir. 2011). In his response brief to the district court and in his briefing
    before us, Smith has advanced a chronology that, if marshaled in an amended complaint,
    may render his charge of discrimination timely. Facts raised for the first time in plaintiff’s
    opposition papers should be considered when determining whether to grant leave to amend
    or to dismiss the complaint with or without prejudice. Broam v. Bogan, 
    320 F.3d 1023
    , 1026
    n.2 (9th Cir. 2003). Moreover, Smith asserts, he discovered in 2009 that the company
    deceived him in 2006 into believing that it would return him to service after he completed
    an additional treatment program. From 2006 to 2010, the company required him to remain
    in that program, while concealing medical records from him which showed that additional
    treatment was not necessary. When he discovered the company’s deception, he filed a
    charge of discrimination. Taking these assertions as true, Smith’s contentions under the
    discovery rule and equitable estoppel are colorable, sufficient to pass the pleading stage. See
    Clark, 
    318 F.3d at 768
    ; Barry, 
    377 F.3d at 688
    ; Artis v. Hitachi Zosen, 
    967 F.2d 132
    , 1144 (7th
    Cir. 1992). The district court was required to consider this new chronology when gauging
    whether any deficiencies in the complaint could be cured. See Indep. Trust Corp. v. Stewart
    Info. Serv. Corp., 
    665 F.3d 930
    , 943-44 (7th Cir. 2012); Rodi v. S. New England Sch. of Law, 
    389 F.3d 5
    , 20 (1st Cir. 2004).
    We conclude that the district court properly dismissed the complaint. Dismissal,
    however, should have been without prejudice, so that Smith could amend his complaint by
    pleading the facts asserted in his response brief. Accordingly, we VACATE in part the
    district court’s order dismissing Smith’s suit with prejudice and REMAND for further
    proceedings consistent with this decision.
    No. 11-2750                                                                              Page 4
    Although dismissal was proper, the district court should have dismissed the
    complaint without prejudice. We disfavor granting dismissal under Rule 12(b)(6) on
    grounds of untimeliness, see Doe v. GTE Corp., 
    347 F.3d 655
    , 657 (7th Cir. 2003); therefore
    when a plaintiff is presented with the affirmative defense by way of a Rule 12(b)(6) motion,
    the plaintiff is ordinarily entitled to at least one opportunity to cure the problem through
    amendment of the pleadings. See Foster v. DeLuca, 
    545 F.3d 582
    , 584 (7th Cir. 2008); Rudder v.
    Williams, 
    2012 WL 119589
    , *3 (D.C. Cir. Jan. 17, 2012); United States v. Corinthian Coll., 
    655 F.3d 984
    , 995 (9th Cir. 2011). In his response brief to the district court and in his briefing
    before us, Smith has advanced a chronology that, if marshaled in an amended complaint,
    may render his charge of discrimination timely. Facts raised for the first time in plaintiff’s
    opposition papers should be considered when determining whether to grant leave to amend
    or to dismiss the complaint with or without prejudice. Broam v. Bogan, 
    320 F.3d 1023
    , 1026
    n.2 (9th Cir. 2003). Moreover, Smith asserts, he discovered in 2009 that the company
    deceived him in 2006 into believing that it would return him to service after he completed
    an additional treatment program. From 2006 to 2010, the company required him to remain
    in that program, while concealing medical records from him which showed that additional
    treatment was not necessary. When he discovered the company’s deception, he filed a
    charge of discrimination. Taking these assertions as true, Smith’s contentions under the
    discovery rule and equitable estoppel are colorable, sufficient to pass the pleading stage. See
    Clark, 
    318 F.3d at 768
    ; Barry, 
    377 F.3d at 688
    ; Artis v. Hitachi Zosen, 
    967 F.2d 132
    , 1144 (7th
    Cir. 1992). The district court was required to consider this new chronology when gauging
    whether any deficiencies in the complaint could be cured. See Indep. Trust Corp. v. Stewart
    Info. Serv. Corp., 
    665 F.3d 930
    , 943-44 (7th Cir. 2012); Rodi v. S. New England Sch. of Law, 
    389 F.3d 5
    , 20 (1st Cir. 2004).
    We conclude that the district court properly dismissed the complaint. Dismissal,
    however, should have been without prejudice, so that Smith could amend his complaint by
    pleading the facts asserted in his response brief. Accordingly, we VACATE in part the
    district court’s order dismissing Smith’s suit with prejudice and REMAND for further
    proceedings consistent with this decision.
    No. 11-2750                                                                              Page 4
    Although dismissal was proper, the district court should have dismissed the
    complaint without prejudice. We disfavor granting dismissal under Rule 12(b)(6) on
    grounds of untimeliness, see Doe v. GTE Corp., 
    347 F.3d 655
    , 657 (7th Cir. 2003); therefore
    when a plaintiff is presented with the affirmative defense by way of a Rule 12(b)(6) motion,
    the plaintiff is ordinarily entitled to at least one opportunity to cure the problem through
    amendment of the pleadings. See Foster v. DeLuca, 
    545 F.3d 582
    , 584 (7th Cir. 2008); Rudder v.
    Williams, 
    2012 WL 119589
    , *3 (D.C. Cir. Jan. 17, 2012); United States v. Corinthian Coll., 
    655 F.3d 984
    , 995 (9th Cir. 2011). In his response brief to the district court and in his briefing
    before us, Smith has advanced a chronology that, if marshaled in an amended complaint,
    may render his charge of discrimination timely. Facts raised for the first time in plaintiff’s
    opposition papers should be considered when determining whether to grant leave to amend
    or to dismiss the complaint with or without prejudice. Broam v. Bogan, 
    320 F.3d 1023
    , 1026
    n.2 (9th Cir. 2003). Moreover, Smith asserts, he discovered in 2009 that the company
    deceived him in 2006 into believing that it would return him to service after he completed
    an additional treatment program. From 2006 to 2010, the company required him to remain
    in that program, while concealing medical records from him which showed that additional
    treatment was not necessary. When he discovered the company’s deception, he filed a
    charge of discrimination. Taking these assertions as true, Smith’s contentions under the
    discovery rule and equitable estoppel are colorable, sufficient to pass the pleading stage. See
    Clark, 
    318 F.3d at 768
    ; Barry, 
    377 F.3d at 688
    ; Artis v. Hitachi Zosen, 
    967 F.2d 132
    , 1144 (7th
    Cir. 1992). The district court was required to consider this new chronology when gauging
    whether any deficiencies in the complaint could be cured. See Indep. Trust Corp. v. Stewart
    Info. Serv. Corp., 
    665 F.3d 930
    , 943-44 (7th Cir. 2012); Rodi v. S. New England Sch. of Law, 
    389 F.3d 5
    , 20 (1st Cir. 2004).
    We conclude that the district court properly dismissed the complaint. Dismissal,
    however, should have been without prejudice, so that Smith could amend his complaint by
    pleading the facts asserted in his response brief. Accordingly, we VACATE in part the
    district court’s order dismissing Smith’s suit with prejudice and REMAND for further
    proceedings consistent with this decision.
    No. 11-2750                                                                              Page 4
    Although dismissal was proper, the district court should have dismissed the
    complaint without prejudice. We disfavor granting dismissal under Rule 12(b)(6) on
    grounds of untimeliness, see Doe v. GTE Corp., 
    347 F.3d 655
    , 657 (7th Cir. 2003); therefore
    when a plaintiff is presented with the affirmative defense by way of a Rule 12(b)(6) motion,
    the plaintiff is ordinarily entitled to at least one opportunity to cure the problem through
    amendment of the pleadings. See Foster v. DeLuca, 
    545 F.3d 582
    , 584 (7th Cir. 2008); Rudder v.
    Williams, 
    2012 WL 119589
    , *3 (D.C. Cir. Jan. 17, 2012); United States v. Corinthian Coll., 
    655 F.3d 984
    , 995 (9th Cir. 2011). In his response brief to the district court and in his briefing
    before us, Smith has advanced a chronology that, if marshaled in an amended complaint,
    may render his charge of discrimination timely. Facts raised for the first time in plaintiff’s
    opposition papers should be considered when determining whether to grant leave to amend
    or to dismiss the complaint with or without prejudice. Broam v. Bogan, 
    320 F.3d 1023
    , 1026
    n.2 (9th Cir. 2003). Moreover, Smith asserts, he discovered in 2009 that the company
    deceived him in 2006 into believing that it would return him to service after he completed
    an additional treatment program. From 2006 to 2010, the company required him to remain
    in that program, while concealing medical records from him which showed that additional
    treatment was not necessary. When he discovered the company’s deception, he filed a
    charge of discrimination. Taking these assertions as true, Smith’s contentions under the
    discovery rule and equitable estoppel are colorable, sufficient to pass the pleading stage. See
    Clark, 
    318 F.3d at 768
    ; Barry, 
    377 F.3d at 688
    ; Artis v. Hitachi Zosen, 
    967 F.2d 132
    , 1144 (7th
    Cir. 1992). The district court was required to consider this new chronology when gauging
    whether any deficiencies in the complaint could be cured. See Indep. Trust Corp. v. Stewart
    Info. Serv. Corp., 
    665 F.3d 930
    , 943-44 (7th Cir. 2012); Rodi v. S. New England Sch. of Law, 
    389 F.3d 5
    , 20 (1st Cir. 2004).
    We conclude that the district court properly dismissed the complaint. Dismissal,
    however, should have been without prejudice, so that Smith could amend his complaint by
    pleading the facts asserted in his response brief. Accordingly, we VACATE in part the
    district court’s order dismissing Smith’s suit with prejudice and REMAND for further
    proceedings consistent with this decision.
    No. 11-2750                                                                              Page 4
    Although dismissal was proper, the district court should have dismissed the
    complaint without prejudice. We disfavor granting dismissal under Rule 12(b)(6) on
    grounds of untimeliness, see Doe v. GTE Corp., 
    347 F.3d 655
    , 657 (7th Cir. 2003); therefore
    when a plaintiff is presented with the affirmative defense by way of a Rule 12(b)(6) motion,
    the plaintiff is ordinarily entitled to at least one opportunity to cure the problem through
    amendment of the pleadings. See Foster v. DeLuca, 
    545 F.3d 582
    , 584 (7th Cir. 2008); Rudder v.
    Williams, 
    2012 WL 119589
    , *3 (D.C. Cir. Jan. 17, 2012); United States v. Corinthian Coll., 
    655 F.3d 984
    , 995 (9th Cir. 2011). In his response brief to the district court and in his briefing
    before us, Smith has advanced a chronology that, if marshaled in an amended complaint,
    may render his charge of discrimination timely. Facts raised for the first time in plaintiff’s
    opposition papers should be considered when determining whether to grant leave to amend
    or to dismiss the complaint with or without prejudice. Broam v. Bogan, 
    320 F.3d 1023
    , 1026
    n.2 (9th Cir. 2003). Moreover, Smith asserts, he discovered in 2009 that the company
    deceived him in 2006 into believing that it would return him to service after he completed
    an additional treatment program. From 2006 to 2010, the company required him to remain
    in that program, while concealing medical records from him which showed that additional
    treatment was not necessary. When he discovered the company’s deception, he filed a
    charge of discrimination. Taking these assertions as true, Smith’s contentions under the
    discovery rule and equitable estoppel are colorable, sufficient to pass the pleading stage. See
    Clark, 
    318 F.3d at 768
    ; Barry, 
    377 F.3d at 688
    ; Artis v. Hitachi Zosen, 
    967 F.2d 132
    , 1144 (7th
    Cir. 1992). The district court was required to consider this new chronology when gauging
    whether any deficiencies in the complaint could be cured. See Indep. Trust Corp. v. Stewart
    Info. Serv. Corp., 
    665 F.3d 930
    , 943-44 (7th Cir. 2012); Rodi v. S. New England Sch. of Law, 
    389 F.3d 5
    , 20 (1st Cir. 2004).
    We conclude that the district court properly dismissed the complaint. Dismissal,
    however, should have been without prejudice, so that Smith could amend his complaint by
    pleading the facts asserted in his response brief. Accordingly, we VACATE in part the
    district court’s order dismissing Smith’s suit with prejudice and REMAND for further
    proceedings consistent with this decision.
    No. 11-2750                                                                              Page 4
    Although dismissal was proper, the district court should have dismissed the
    complaint without prejudice. We disfavor granting dismissal under Rule 12(b)(6) on
    grounds of untimeliness, see Doe v. GTE Corp., 
    347 F.3d 655
    , 657 (7th Cir. 2003); therefore
    when a plaintiff is presented with the affirmative defense by way of a Rule 12(b)(6) motion,
    the plaintiff is ordinarily entitled to at least one opportunity to cure the problem through
    amendment of the pleadings. See Foster v. DeLuca, 
    545 F.3d 582
    , 584 (7th Cir. 2008); Rudder v.
    Williams, 
    2012 WL 119589
    , *3 (D.C. Cir. Jan. 17, 2012); United States v. Corinthian Coll., 
    655 F.3d 984
    , 995 (9th Cir. 2011). In his response brief to the district court and in his briefing
    before us, Smith has advanced a chronology that, if marshaled in an amended complaint,
    may render his charge of discrimination timely. Facts raised for the first time in plaintiff’s
    opposition papers should be considered when determining whether to grant leave to amend
    or to dismiss the complaint with or without prejudice. Broam v. Bogan, 
    320 F.3d 1023
    , 1026
    n.2 (9th Cir. 2003). Moreover, Smith asserts, he discovered in 2009 that the company
    deceived him in 2006 into believing that it would return him to service after he completed
    an additional treatment program. From 2006 to 2010, the company required him to remain
    in that program, while concealing medical records from him which showed that additional
    treatment was not necessary. When he discovered the company’s deception, he filed a
    charge of discrimination. Taking these assertions as true, Smith’s contentions under the
    discovery rule and equitable estoppel are colorable, sufficient to pass the pleading stage. See
    Clark, 
    318 F.3d at 768
    ; Barry, 
    377 F.3d at 688
    ; Artis v. Hitachi Zosen, 
    967 F.2d 132
    , 1144 (7th
    Cir. 1992). The district court was required to consider this new chronology when gauging
    whether any deficiencies in the complaint could be cured. See Indep. Trust Corp. v. Stewart
    Info. Serv. Corp., 
    665 F.3d 930
    , 943-44 (7th Cir. 2012); Rodi v. S. New England Sch. of Law, 
    389 F.3d 5
    , 20 (1st Cir. 2004).
    We conclude that the district court properly dismissed the complaint. Dismissal,
    however, should have been without prejudice, so that Smith could amend his complaint by
    pleading the facts asserted in his response brief. Accordingly, we VACATE in part the
    district court’s order dismissing Smith’s suit with prejudice and REMAND for further
    proceedings consistent with this decision.
    No. 11-2750                                                                              Page 4
    Although dismissal was proper, the district court should have dismissed the
    complaint without prejudice. We disfavor granting dismissal under Rule 12(b)(6) on
    grounds of untimeliness, see Doe v. GTE Corp., 
    347 F.3d 655
    , 657 (7th Cir. 2003); therefore
    when a plaintiff is presented with the affirmative defense by way of a Rule 12(b)(6) motion,
    the plaintiff is ordinarily entitled to at least one opportunity to cure the problem through
    amendment of the pleadings. See Foster v. DeLuca, 
    545 F.3d 582
    , 584 (7th Cir. 2008); Rudder v.
    Williams, 
    2012 WL 119589
    , *3 (D.C. Cir. Jan. 17, 2012); United States v. Corinthian Coll., 
    655 F.3d 984
    , 995 (9th Cir. 2011). In his response brief to the district court and in his briefing
    before us, Smith has advanced a chronology that, if marshaled in an amended complaint,
    may render his charge of discrimination timely. Facts raised for the first time in plaintiff’s
    opposition papers should be considered when determining whether to grant leave to amend
    or to dismiss the complaint with or without prejudice. Broam v. Bogan, 
    320 F.3d 1023
    , 1026
    n.2 (9th Cir. 2003). Moreover, Smith asserts, he discovered in 2009 that the company
    deceived him in 2006 into believing that it would return him to service after he completed
    an additional treatment program. From 2006 to 2010, the company required him to remain
    in that program, while concealing medical records from him which showed that additional
    treatment was not necessary. When he discovered the company’s deception, he filed a
    charge of discrimination. Taking these assertions as true, Smith’s contentions under the
    discovery rule and equitable estoppel are colorable, sufficient to pass the pleading stage. See
    Clark, 
    318 F.3d at 768
    ; Barry, 
    377 F.3d at 688
    ; Artis v. Hitachi Zosen, 
    967 F.2d 132
    , 1144 (7th
    Cir. 1992). The district court was required to consider this new chronology when gauging
    whether any deficiencies in the complaint could be cured. See Indep. Trust Corp. v. Stewart
    Info. Serv. Corp., 
    665 F.3d 930
    , 943-44 (7th Cir. 2012); Rodi v. S. New England Sch. of Law, 
    389 F.3d 5
    , 20 (1st Cir. 2004).
    We conclude that the district court properly dismissed the complaint. Dismissal,
    however, should have been without prejudice, so that Smith could amend his complaint by
    pleading the facts asserted in his response brief. Accordingly, we VACATE in part the
    district court’s order dismissing Smith’s suit with prejudice and REMAND for further
    proceedings consistent with this decision.
    No. 11-2750                                                                              Page 4
    Although dismissal was proper, the district court should have dismissed the
    complaint without prejudice. We disfavor granting dismissal under Rule 12(b)(6) on
    grounds of untimeliness, see Doe v. GTE Corp., 
    347 F.3d 655
    , 657 (7th Cir. 2003); therefore
    when a plaintiff is presented with the affirmative defense by way of a Rule 12(b)(6) motion,
    the plaintiff is ordinarily entitled to at least one opportunity to cure the problem through
    amendment of the pleadings. See Foster v. DeLuca, 
    545 F.3d 582
    , 584 (7th Cir. 2008); Rudder v.
    Williams, 
    2012 WL 119589
    , *3 (D.C. Cir. Jan. 17, 2012); United States v. Corinthian Coll., 
    655 F.3d 984
    , 995 (9th Cir. 2011). In his response brief to the district court and in his briefing
    before us, Smith has advanced a chronology that, if marshaled in an amended complaint,
    may render his charge of discrimination timely. Facts raised for the first time in plaintiff’s
    opposition papers should be considered when determining whether to grant leave to amend
    or to dismiss the complaint with or without prejudice. Broam v. Bogan, 
    320 F.3d 1023
    , 1026
    n.2 (9th Cir. 2003). Moreover, Smith asserts, he discovered in 2009 that the company
    deceived him in 2006 into believing that it would return him to service after he completed
    an additional treatment program. From 2006 to 2010, the company required him to remain
    in that program, while concealing medical records from him which showed that additional
    treatment was not necessary. When he discovered the company’s deception, he filed a
    charge of discrimination. Taking these assertions as true, Smith’s contentions under the
    discovery rule and equitable estoppel are colorable, sufficient to pass the pleading stage. See
    Clark, 
    318 F.3d at 768
    ; Barry, 
    377 F.3d at 688
    ; Artis v. Hitachi Zosen, 
    967 F.2d 132
    , 1144 (7th
    Cir. 1992). The district court was required to consider this new chronology when gauging
    whether any deficiencies in the complaint could be cured. See Indep. Trust Corp. v. Stewart
    Info. Serv. Corp., 
    665 F.3d 930
    , 943-44 (7th Cir. 2012); Rodi v. S. New England Sch. of Law, 
    389 F.3d 5
    , 20 (1st Cir. 2004).
    We conclude that the district court properly dismissed the complaint. Dismissal,
    however, should have been without prejudice, so that Smith could amend his complaint by
    pleading the facts asserted in his response brief. Accordingly, we VACATE in part the
    district court’s order dismissing Smith’s suit with prejudice and REMAND for further
    proceedings consistent with this decision.