diff --git a/code/game/objects/items/weapons/caution.dm b/code/game/objects/items/weapons/caution.dm
index 6790eab4376..fa5b3c6877a 100644
--- a/code/game/objects/items/weapons/caution.dm
+++ b/code/game/objects/items/weapons/caution.dm
@@ -74,9 +74,11 @@
 	energy_type = /datum/robot_storage/energy/janitor/landmine
 	is_cyborg = TRUE
 
-/obj/item/stack/caution/proximity_sign/malf/afterattack(atom/target, mob/user)
+/obj/item/stack/caution/proximity_sign/malf/afterattack(atom/target, mob/user, proximity)
 	if(!check_allowed_items(target, 1))
 		return
+	if(!proximity)
+		return
 	var/turf/T = get_turf(target)
 
 	if(is_blocked_turf(T, TRUE)) //can't put mines on a tile that has dense stuff