Cambridge United have signed Grimsby Town midfielder Dean Sinclair until the end of the season.
The deal was finalised before Friday's Football Conference deadline but the U's did not receive Football Association confirmation until Monday.
The 26-year-old has made 12 appearances this season, scoring three goals, including the opener in February's 1-1 draw with the U's.
He joined the Mariners in December after a lengthy injury lay-off.
After undergoing a knee operation in the summer the former Barnet and Charlton player proved his fitness to then Grimsby boss Neil Woods to earn a deal until the summer.