diff --git a/code/game/objects/items/storage/toolbox.dm b/code/game/objects/items/storage/toolbox.dm
index 5c6bd7602a..c28f7e2aaa 100644
--- a/code/game/objects/items/storage/toolbox.dm
+++ b/code/game/objects/items/storage/toolbox.dm
@@ -87,9 +87,9 @@
 /obj/item/storage/toolbox/mechanical/old/heirloom/afterattack(atom/A, mob/user, proximity) //Citadel Adds massive buff to machinery destruction
 	. = ..()
 	if(proximity)
-		if(isobj(A) && !isitem(A))
-			var/obj/O = A
-			if(O.damage_deflection >= 18)		//Eh fine.
+		if(isobj(A))
+			var/obj/machinery/door/O = A
+			if(istype(O) && (O.damage_deflection >= 18))		//Eh fine.		//This is a meme cast do not do what I did!
 				return
 			O.take_damage(20)