diff --git a/code/game/objects/items/weapons/storage/backpack.dm b/code/game/objects/items/weapons/storage/backpack.dm
index 5bae7ddf7ee..0110a6ac2cf 100644
--- a/code/game/objects/items/weapons/storage/backpack.dm
+++ b/code/game/objects/items/weapons/storage/backpack.dm
@@ -71,7 +71,7 @@
 	return 0
 
 /obj/item/weapon/storage/backpack/holding/handle_item_insertion(obj/item/W, prevent_warning = 0, mob/user)
-	if((istype(W, /obj/item/weapon/storage/backpack/holding) || count_by_type(GetAllContents(W), /obj/item/weapon/storage/backpack/holding)) && !W.crit_fail)
+	if((istype(W, /obj/item/weapon/storage/backpack/holding) || count_by_type(W.GetAllContents(), /obj/item/weapon/storage/backpack/holding)) && !W.crit_fail)
 		var/safety = alert(user, "Doing this will have extremely dire consequences for the station and its crew. Be sure you know what you're doing.", "Put in [name]?", "Proceed", "Abort")
 		if(safety == "Abort" || !in_range(src, user) || !src || !W || user.incapacitated())
 			return