Carlos Mejilla-Hernandez appeals his sentence imposed following his guilty plea *251to illegal reentry after deportation. He was sentenced to 29 months of imprisonment and three years of supervised release. He argues that, in light of United States v. Booker, — U.S. -, 125 S.Ct. 738, 160 L.Ed.2d 621 (2005), his sentence is invalid because the district court applied the sentencing guidelines as if they were mandatory. Because Mejilla-Hernandez did not raise this issue in the district court, we review it only for plain error. United States v. Mares, 402 F.3d 511, 513, 520-22 (5th Cir. 2005), petition for cert. filed (Mar. 31, 2005) (No. 04-9517); United States v. Valenzuela-Quevedo, 407 F.3d 728, 732 (5th Cir. 2005); United States v. Malveaux, 411 F.3d 558, 559 n. 9 (5th Cir. 2005).

As Mejilla-Hernandez concedes, he is unable to establish plain error with regard to his Booker claim because he cannot establish that being sentenced under a mandatory guidelines scheme affected his substantial rights. The record does not indicate that the district court “would have reached a significantly different result” under a sentencing scheme in which the guidelines were advisory only. See Mares, 402 F.3d at 520-22; Valenzuela-Quevedo, 407 F.3d at 733-34.

Mejilla-Hernandez also asserts that the “felony” and “aggravated felony” provisions of 8 U.S.C. § 1326(a) and (b) are unconstitutional. He acknowledges that his argument is foreclosed, but he seeks to preserve the issue for possible Supreme Court review in light of Apprendi v. New Jersey, 530 U.S. 466, 120 S.Ct. 2348, 147 L.Ed.2d 435 (2000), and Shepard v. United States, — U.S. -, 125 S.Ct. 1254, 161 L.Ed.2d 205 (2005). This issue is foreclosed. See Almendarez-Torres v. United States, 523 U.S. 224, 247, 118 S.Ct. 1219, 140 L.Ed.2d 350 (1998); United States v. Dabeit, 231 F.3d 979, 984 (5th Cir. 2000).

Accordingly, the judgment of the district court is AFFIRMED.