diff --git a/code/game/machinery/doors/firedoor.dm b/code/game/machinery/doors/firedoor.dm
index c5deb7b29750..69169d167f3e 100644
--- a/code/game/machinery/doors/firedoor.dm
+++ b/code/game/machinery/doors/firedoor.dm
@@ -495,7 +495,7 @@
 	density = TRUE
 	var/constructionStep = CONSTRUCTION_NOCIRCUIT
 	var/reinforced = 0
-	var/firelock_type
+	var/firelock_type = /obj/machinery/door/firedoor/closed
 
 /obj/structure/firelock_frame/examine(mob/user)
 	. = ..()