diff --git a/src/p_map.c b/src/p_map.c
index b60d243e2..d6a3044cb 100644
--- a/src/p_map.c
+++ b/src/p_map.c
@@ -1635,7 +1635,8 @@ static boolean P_IsLineBlocking(const line_t *ld, const mobj_t *thing)
 			(
 					(ld->flags & ML_IMPASSABLE) || // block objects from moving through this linedef.
 					(thing->player && !thing->player->spectator &&
-						ld->flags & ML_BLOCKPLAYERS) // SRB2Kart: Only block players, not items
+						ld->flags & ML_BLOCKPLAYERS) || // SRB2Kart: Only block players, not items
+					((thing->flags & (MF_ENEMY|MF_BOSS)) && ld->special == 11) // case 11: block monsters only
 			);
 	}
 }