diff --git a/code/modules/mapfluff/ruins/spaceruin_code/TheDerelict.dm b/code/modules/mapfluff/ruins/spaceruin_code/TheDerelict.dm
index 9a5d3a3db86..cf85a2beda6 100644
--- a/code/modules/mapfluff/ruins/spaceruin_code/TheDerelict.dm
+++ b/code/modules/mapfluff/ruins/spaceruin_code/TheDerelict.dm
@@ -1,3 +1,5 @@
+#define DERELICT_VAULT_ID "derelictvault"
+
 /////////// thederelict items
 
 /obj/item/paper/fluff/ruins/thederelict/equipment
@@ -49,6 +51,7 @@
 	use_power = NO_POWER_USE
 	resistance_flags = INDESTRUCTIBLE | LAVA_PROOF | FIRE_PROOF | UNACIDABLE | ACID_PROOF
 
+	var/door_id = DERELICT_VAULT_ID
 	var/obj/structure/cable/attached_cable
 	var/obj/machinery/door/airlock/vault/derelict/door1
 	var/obj/machinery/door/airlock/vault/derelict/door2
@@ -76,7 +79,7 @@
 ///Initializes airlock links.
 /obj/machinery/computer/vaultcontroller/proc/find_airlocks()
 	for(var/obj/machinery/door/airlock/A as anything in SSmachines.get_machines_by_type_and_subtypes(/obj/machinery/door/airlock))
-		if(A.id_tag == "derelictvault")
+		if(A.id_tag == door_id)
 			if(!door1)
 				door1 = A
 				continue
@@ -161,7 +164,7 @@
 	move_resist = INFINITY
 	use_power = NO_POWER_USE
 	resistance_flags = INDESTRUCTIBLE | LAVA_PROOF | FIRE_PROOF | UNACIDABLE | ACID_PROOF
-	id_tag = "derelictvault"
+	id_tag = DERELICT_VAULT_ID
 	has_access_panel = FALSE
 
 ///Overrides screwdriver act to prevent all deconstruction and hacking. Override for extra tuff fluff
@@ -312,3 +315,5 @@
 /obj/item/tape/captains_log/Initialize(mapload)
 	. = ..()
 	unspool() // the tape spawns damaged
+
+#undef DERELICT_VAULT_ID