Barcelona returned to training after a week off on Sunday with Moussa Wague taking part in Ernesto Valverde's session.
The Senegal international joined the club in the summer after scoring at the World Cup but has been unable to play for the first team due to paperwork issues.
However, the Barça B right-back now has clearance to play for Valverde's side and trained under the Basque coach's orders on Sunday.
Wague, 20, joined the club from Belgian side KAS Eupen and has impressed in his appearances for the second team this season.
He will now provide valuable defensive cover for the first team, too, and could even feature in the upcoming Copa del Rey games against Levante.