diff --git a/code/modules/admin/fun_balloon.dm b/code/modules/admin/fun_balloon.dm
index 7fb8e63c05e..522b112cab3 100644
--- a/code/modules/admin/fun_balloon.dm
+++ b/code/modules/admin/fun_balloon.dm
@@ -108,7 +108,7 @@
 /obj/effect/forcefield/arena_shuttle
 	name = "portal"
 	timeleft = 0
-	var/list/warp_points
+	var/list/warp_points = list()
 
 /obj/effect/forcefield/arena_shuttle/Initialize()
 	. = ..()