Abstract: In a fan module (10) of a vehicle engine, the fixed shroud (12) of the module (10) has a circular opening (16) receiving a fan (14) rotating about a main axis (X). The opening (16) is circumvented by a peripheral wall (18) cylindrically extending in the downstream direction (DD) beyond the fan (14) toward a corner edge where the wall (18) angles radially and inwardly to extend toward a circular downstream edge. The downstream portion of the peripheral wall (18) forms an annular channel (C) opening in the upstream direction (UD) The channel (C) forming an axial continuation of the gap (G) that is between the tips (22) of the blades (20) of the fan (14). The gap (G) is continuous, non-divided and non-partitioned.