ON REMAND FROM THE SUPREME COURT OF THE UNITED STATES

On December 17, 2004, in an unpublished opinion, this court affirmed the sentence of Samir Lopez-Cruz. United States v. Lopez-Cruz, 115 Fed. Appx. 742 (5th Cir. 2004). The Supreme Court has vacated and remanded for further consideration in light of United States v. Booker, — U.S. -, 125 S.Ct. 738, 160 L.Ed.2d 621 (2005). We requested and received supplemental letter briefs addressing the impact of Booker.

Lopez contends that the district court illegally sentenced him pursuant to a mandatory Sentencing Guidelines regime, in violation of Booker. He concedes that such argument is raised for the first time and is reviewable 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). Sentencing a defendant pursuant to a mandatory guideline scheme, standing alone, constitutes “Fanfan ” error, and such an error is “plain.” See Booker, 125 S.Ct. at 750, 768-69 (addressing preserved challenge in companion case); United States v. Valenzuela-Quevedo, 407 F.3d 728, 732-33 (5th Cir. 2005), petition for cert. filed (Jul. 25, 2005) (No. 05-5556).

To satisfy the third prong of the plain-error test, Lopez must show that his “substantial rights” were affected. See Valenzuela-Quevedo, 407 F.3d at 732. “The pertinent question is whether [the appellant] demonstrated that the sentencing *633 judge—sentencing under an advisory scheme rather than a mandatory one— would have reached a significantly different result.” Mares, 402 F.3d at 521. This question requires us to assess whether “there is [an] indication in the record from the sentencing judge’s remarks or otherwise that gives us any clue as to whether [ ]he would have reached a different conclusion” if sentencing under an advisory scheme. Id. at 522. There is no indication in the record of Lopez’s sentencing that the district court would have sentenced him differently under an advisory regime. See United States v. Bringier, 405 F.3d 310, 317-18 n. 4 (5th Cir. 2005), petition for cert. filed (Jul. 26, 2005) (No. 05-5535) (imposition of sentence at bottom of guideline range, standing alone, is no indication that judge would have reached different conclusion under an advisory regime).

To the extent that Lopez argues that the Booker error is a “structural” one that is not susceptible to a plain-error analysis, or that he alternatively contends that plain-error prejudice should be presumed, this court has rejected such arguments. United States v. Martinez-Lugo, 411 F.3d 597, 601 (5th Cir. 2005).

Accordingly, we conclude that nothing in the Supreme Court’s Booker decision requires us to change our prior affirmance in this case. We therefore reinstate our judgment affirming the defendant’s conviction and sentence.