The only goal of the game was scored by Doisy Soko at the 52nd minute of play.
Pedro Benali's men had several opportunities to score, especially in the first half, but failed to do so.
In the other game of the group, played earlier in the day, Cameroon's Coton Sport lost at home to Algerian side JS Kabylie (2-1).
The result sees JS Kabylie move to nine points on top of Group B, same as Coton Sport but set apart by their head-to-head record, while Renaissance Berkane occupies 3rd place with 5 points and Napsa Stars closes the group with 4 points.