MEMORANDUM **

Eduardo Rodriguez-Vazquez appeals his sentence imposed following his guilty plea to unlawfully entering the United States after having been previously deported in violation of 8 U.S.C. § 1326.

Rodriguez-Vazquez’s Sixth Amendment challenge to his sentencing enhancement based on a prior felony conviction remains foreclosed after United States v. Booker, — U.S. -, 125 S.Ct. 738, 160 L.Ed.2d 621 (2005). See United States v. Moreno-Hernandez, 419 F.3d 906, 915 n. 8 (9th Cir. 2005) (explaining that a district judge’s enhancement of a sentence, based on the fact of a prior conviction does not raise any Sixth Amendment problems).

*884Because Rodriguez-Vazquez was sentenced under the then-mandatory Sentencing Guidelines, and we cannot reliably determine from the record whether the sentence imposed would have been materially different had the district court known that the Guidelines were advisory, we remand to the district court to answer that question, and to proceed pursuant to United States v. Ameline, 409 F.3d 1073, 1084 (9th Cir. 2005) (en banc). See Moreno-Hernandez, at 915 (extending Ameline’ s limited remand procedure to cases involving non-constitutional Booker error).

REMANDED.