diff --git a/constants/scene_constants.asm b/constants/scene_constants.asm
index 67a0351ce..6039d69b5 100644
--- a/constants/scene_constants.asm
+++ b/constants/scene_constants.asm
@@ -6,6 +6,9 @@ SCENE_DEFAULT  EQU 0
 ; Often a map will have a one-time default event for scene 0, and switch to a
 ; do-nothing scene 1 when the event finishes.
 SCENE_FINISHED EQU 1
+; A coord_event for scene -1 will always activate, regardless of the map's
+; scene variable value.
+SCENE_ALWAYS   EQU -1
 
 ; wPokecenter2FSceneID
 	const_def 1