Julio Santos-Padilla (“Santos”), also known as Jaime Santiago Guzman-Lopez, appeals the sentence imposed following his guilty plea to illegal reentry. 8 U.S.C. § 1326(a), (b). He argues for the first time on appeal that he is entitled to resentencing because he was sentenced under the mandatory Sentencing Guidelines regime held unconstitutional in United States v. Booker, — U.S. -, 125 S.Ct. 738, 160 L.Ed.2d 621 (2005). We review this argument for plain error only. See United States v. Martinez-Lugo, 411 F.3d 597, 600 (5th Cir. 2005), cert. denied, — U.S. -, 126 S.Ct. 464, — L.Ed.2d - (2005) (No. 05-6242).

Our review of the record does not reveal that the district court’s error affected the outcome of the sentencing proceedings. See United States v. Valenzuela-Quevedo, 407 F.3d 728, 732-33 (5th Cir.), cert. denied, — U.S. -, 126 S.Ct. 267, — L.Ed.2d - (2005). Because Santos has failed to establish that the error affected his substantial rights, he cannot meet the plain error standard of review. See id. Given that Santos is not entitled to resentencing, we pretermit discussion of the validity of his appeal waiver.

AFFIRMED.