Daniel Esteban Ortega appeals his ten-month sentence of imprisonment following his guilty plea conviction for transporting an unlawful alien within the United States. Ortega argues that the district court committed plain error by considering that Ortega had not cooperated with the Government in deciding to sentence him to imprisonment rather than probation. This was not error. See Roberts v. United States, 445 U.S. 552, 557-58, 100 S.Ct. 1358, 63 L.Ed.2d 622 (1980); United States v. Dickson, 712 F.2d 952, 955 (5th Cir. 1983).

Ortega argues that consideration of his lack of cooperation violated his Fifth Amendment privilege against self-incrimination. He did not assert the privilege in the district court and, thus, this issue is deemed waived. See Roberts, 445 U.S. at 559, 100 S.Ct. 1358; United States v. Pool, 660 F.2d 547, 556 (5th Cir. 1981).

AFFIRMED.