Anthony Sanford challenges the sentence the district court 1 imposed after he pleaded guilty to a drug conspiracy. His counsel has moved to withdraw and filed a brief under Anders v. California, 386 U.S. 738, 87 S.Ct. 1396, 18 L.Ed.2d 493 (1967), arguing that it was plain error under Blakely v. Washington, 542 U.S. 296, 124 S.Ct. 2531, 159 L.Ed.2d 403 (2004), for the court to assess two criminal history points based on Sanford’s probationary status at the time he committed the instant offense.

This argument fails. A jury need not find the fact of a prior conviction, see United States v. Booker, — U.S. -, ---, 125 S.Ct. 738, 755-56, 160 L.Ed.2d 621 (2005), and Sanford did not object to the presentence report’s factual determination that he was on probation for a prior conviction when he committed the instant offense, see United States v. Speller, 356 F.3d 904, 907 (8th Cir. 2004).

Having reviewed the record independently pursuant to Penson v. Ohio, 488 U.S. 75, 109 S.Ct. 346, 102 L.Ed.2d 300 (1988), we find no nonfrivolous issues. Accordingly, we affirm, and we grant counsel’s motion to withdraw.