. Luis Manuel Aguilar pleaded guilty to one charge of being a convicted felon in possession of a firearm, and the district court sentenced him to serve 120 months in prison. Aguilar appeals his sentence. He argues that the prosecutor committed misconduct by making certain remarks at ■sentencing. He also argues that he is entitled to resentencing because the district court made no findings in support of its conclusion that a four-level sentencing adjustment should be applied and because no evidence pertaining to this adjustment was offered at the hearing.

The Government argues that the appeal should be dismissed because Aguilar waived his right to appeal and because the waiver is valid and enforceable. The Government also asserts that Aguilar’s prose-cutorial misconduct claim is without merit.

This court reviews the validity of an appeal waiver de novo. See United States v. Baymon, 312 F.3d 725, 727 (5th Cir. 2002). Our review of the record shows that Aguilar’s waiver of his appellate rights was knowing and voluntary. See United States v. Bond, 414 F.3d 542, 544 (5th Cir. 2005). Aguilar’s claims concerning the disputed sentencing adjustment fall within the scope of the waiver. We thus decline to consider these claims. See id.

The appellate waiver clause found in Aguilar’s plea agreement contains an explicit exception for claims concerning pros-ecutorial misconduct. Consequently, consideration of his claim concerning the prosecutor’s alleged improper statements at sentencing is not barred by the waiver. *689 Nevertheless, Aguilar’s prosecutorial misconduct claim lacks merit. Our review of the record shows that the disputed statements were not improper and caused no prejudice to Aguilar. See United States v. Lankford, 196 F.3d 563, 574 (5th Cir. 1999). The judgment of the district court is AFFIRMED.