Bernal Meza-Flores appeals his sentence following his guilty-plea conviction for possession with the intent to distribute and distribution of approximately two kilograms of methamphetamine. For the first time on appeal, Meza-Flores argues that his sentence violates United States v. Booker, — U.S. -, 125 S.Ct. 738, 160 L.Ed.2d 621 (2005) because it was based on an amount of “ice” methamphetamine that was never admitted by him. He argues that under Booker, he could only be sentenced based on the amount of drug that was proven in this case by “admission,” which was 1.8 kilograms of “ice” methamphetamine. Because Meza-Flores did not object in the district court to his sentence on this basis, his argument is reviewed for plain error only. See United States v. Mares, 402 F.3d 511, 520-21 (5th Cir. 2005), petition for cert. filed (Mar. 31, 2005) (No. 04-9517).

Even if Meza-Flores was held accountable for only 1.8 kilograms of “ice” methamphetamine, his base offense level would have remained the same. U.S.S.G. § 2D1.1(c)(1). The sentence thus did not exceed the maximum authorized by the facts admitted by Meza-Flores during the plea proceedings. To the extent that the district court’s selection of a sentence within the guidelines range was based on the erroneous conclusion that Meza-Flores should be held responsible for the full 4.53 kilogram amount, Meza-Flores must show that the court’s error was plain and that it affected his substantial rights. See United States v. Bringier, 405 F.3d 310, 316-17 (5th Cir. 2005). He has made no such showing. Id. at 317-18. Accordingly, the judgment of the district court is AFFIRMED.