diff --git a/code/game/objects/structures/window_spawner.dm b/code/game/objects/structures/window_spawner.dm
index 449001492b..7cdf301f6c 100644
--- a/code/game/objects/structures/window_spawner.dm
+++ b/code/game/objects/structures/window_spawner.dm
@@ -22,6 +22,9 @@
 /obj/effect/wingrille_spawn/attack_generic()
 	activate()
 
+/obj/effect/wingrille_spawn/CanPass(atom/movable/mover, turf/target, height=1.5, air_group = 0)
+	return FALSE
+
 /obj/effect/wingrille_spawn/initialize()
 	..()
 	if(!win_path)