diff --git a/code/game/machinery/doors/airlock.dm b/code/game/machinery/doors/airlock.dm
index 13e6ca1253..54292a3af3 100644
--- a/code/game/machinery/doors/airlock.dm
+++ b/code/game/machinery/doors/airlock.dm
@@ -1011,7 +1011,7 @@
 			if(AIRLOCK_SECURITY_NONE)
 				if(istype(C, /obj/item/stack/sheet/metal))
 					var/obj/item/stack/sheet/metal/S = C
-					if(S.amount < 2)
+					if(S.get_amount() < 2)
 						to_chat(user, "<span class='warning'>You need at least 2 metal sheets to reinforce [src].</span>")
 						return
 					to_chat(user, "<span class='notice'>You start reinforcing [src]</span>")
@@ -1025,7 +1025,7 @@
 					return
 				else if(istype(C, /obj/item/stack/sheet/plasteel))
 					var/obj/item/stack/sheet/plasteel/S = C
-					if(S.amount < 2)
+					if(S.get_amount() < 2)
 						to_chat(user, "<span class='warning'>You need at least 2 plasteel sheets to reinforce [src].</span>")
 						return
 					to_chat(user, "<span class='notice'>You start reinforcing [src].</span>")