ORDER

In September 2007 Paul Taylor sued the City of Chicago and three police officers, claiming under 42 U.S.C. § 1983 that the officers had violated his constitutional rights. The district court granted the de *761 fendants’ motion to dismiss the complaint. We affirm.

Taylor’s suit arises from two arrests, the first in June 2005 and the second the following month. Both arrests, according to Taylor, were unlawful, and by October 2005 all related charges had been dismissed. Taylor, though, already filed a nearly identical § 1988 suit against the City and the same three officers in June 2006, and in April 2007 the district court dismissed that action for failure to prosecute. See Taylor v. Chi. Police Dep’t, No. 06 C 3168 (N.D.Ill. Apr. 13, 2007). Rather than appeal that decision, Taylor filed this action. The district court concluded that, not only is the new suit barred by the statute of limitations and precluded by the earlier complaint, but it should be dismissed because Taylor lied to the court by stating on his form complaint that he had not filed any other federal lawsuit.

On appeal Taylor argues that his complaint is not time-barred because he made an “honest attempt” to file it sooner; he does not address the district court’s alternative grounds for dismissal. That omission is reason enough for us to uphold the judgment, see Wojtas v. Capital Guardian Trust Co., 477 F.3d 924, 926 (7th Cir. 2007); Kauthar SDN BHD v. Sternberg, 149 F.3d 659, 668 (7th Cir. 1998), but at all events Taylor’s second lawsuit is precluded by the earlier judgment. The doctrine of claim preclusion bars relitigation of claims that were, or could have been, decided on the merits in a prior lawsuit between the same parties. See Brooks-Ngwenya v. Indianapolis Pub. Sch., 564 F.3d 804, 809 (7th Cir. 2009); Brzostowski v. Laidlaw Waste Sys., Inc., 49 F.3d 337, 338 (7th Cir. 1995). A dismissal for failure to prosecute operates as a final judgment on the merits. Fed.R.Civ.P. 41(b); Tartt v. Northwest Comty. Hosp., 453 F.3d 817, 822 (7th Cir. 2006); LeBeau v. Taco Bell, Inc., 892 F.2d 605, 607 (7th Cir. 1989). Taylor’s suit in June 2006 was against the same defendants and involved the identical constitutional claims based on the arrests in June and July 2005. The dismissal on grounds of claim preclusion was therefore correct.

AFFIRMED.