Ricardo Morales Herrera appeals his 125-month sentence for aiding and abet *284 ting a carjacking and possession of a firearm in relation to a crime of violence, in violation of 18 U.S.C. §§ 2, 924(c)(1), and 2119. He asserts that his trial counsel was ineffective for failing to move the district court for a mental competency hearing prior to sentencing.

Generally, this court does not review claims of ineffective assistance of counsel on direct appeal unless the record is sufficiently developed to allow us to fairly evaluate the merits of the issue. See United States v. Higdon, 832 F.2d 312, 313-14 (5th Cir. 1987). In this case, the trial record is adequate to determine that counsel’s representation was not constitutionally defective.

At the time Herrera was sentenced, 18 U.S.C. § 4241(a) (2004) provided that, at any time

prior to the sentencing of the defendant, the defendant or the attorney for the Government may file a motion for a hearing to determine the mental competency of the defendant. The court shall grant the motion, or shall order such a hearing on its own motion, if there is reasonable cause to believe that the defendant may presently be suffering from a mental disease or defect rendering him mentally incompetent to the extent that he is unable to understand the nature and consequences of the proceedings against him or to assist properly in his defense.

The record shows that counsel alerted the district court to Herrera’s questionable mental capacity at the outset of the sentencing hearing. As a result, the district court investigated the matter and questioned Herrera. The court implicitly applied the standard in 18 U.S.C. § 4241(a) and determined that Herrera was able understand the nature and consequences of the proceedings against him and assist properly in his defense.

In light of the circumstances, counsel’s failure to explicitly move the court for a competency hearing under 18 U.S.C. § 4241 was not outside the wide range of professionally competent assistance. Herrera has failed to establish that counsel’s performance was deficient under Strickland v. Washington, 466 U.S. 668, 687-90, 104 S.Ct. 2052, 80 L.Ed.2d 674 (1984). Accordingly, he has failed to show that counsel was ineffective. See id. at 697, 104 S.Ct. 2052.

The judgment of the district court is AFFIRMED.