diff --git a/code/game/objects/items/stacks/stack.dm b/code/game/objects/items/stacks/stack.dm
index 5fca9ac4f8f1..b00f72205d08 100644
--- a/code/game/objects/items/stacks/stack.dm
+++ b/code/game/objects/items/stacks/stack.dm
@@ -199,7 +199,7 @@ Also change the icon to reflect the amount of sheets, if possible.*/
 
 			if(R.one_per_turf != ONE_TYPE_PER_BORDER) //all barricade-esque structures utilize this define and have their own check for object density. checking twice is unneeded.
 				for(var/obj/object in usr.loc)
-					if(object.density || (istype(object, /obj/structure/machinery/door) && !istype(object, /obj/structure/machinery/door/firedoor)))
+					if(object.density || istype(object, /obj/structure/machinery/door/airlock))
 						to_chat(usr, SPAN_WARNING("[object] is blocking you from constructing \the [R.title]!"))
 						return