The Redskins have signed rookie cornerback Brandon Thompson from the practice squad, the team announced on Friday.

To make room for Thompson, the Redskins waived offensive lineman Jonathan Compas.

Thompson spent the first four weeks of the season on the Redskins' roster, appearing in two games. He saw action at cornerback in the Redskins' Week 2 game vs. Arizona and he appeared on special teams in the Redskins' Week 3 game at Dallas.

Thompson joined the Redskins as a 2011 seventh-round draft pick last April. He played college football at Boise State.

With Thompson back in the fold, the Redskins enter Sunday's game at Buffalo with six cornerbacks on the roster. The Bills employ a spread offense, so the thinking could be that the defense needs numbers in the secondary.

The Redskins have been banged up in the secondary, though. Cornerbacks DeAngelo Hall and Phillip Buchanon are questionable for the Bills game. Hall has a hip injury and Buchanon has neck and knee injuries.