diff --git a/constants/space_constants.asm b/constants/space_constants.asm
old mode 100755
new mode 100644
index 6849ae7f2..293c5cb5e
--- a/constants/space_constants.asm
+++ b/constants/space_constants.asm
@@ -3,14 +3,15 @@ DEF FIRST_SPACE_METATILE        EQU $80
 DEF FIRST_GREY_SPACE_METATILE   EQU $e0
 DEF UNIQUE_SPACE_METATILES_MASK EQU %11111
 
-; reserved next space values that signal movement towards anchor point rather than towards space
-	const_def -1, -1
-	const GO_DOWN  ; 255
-	const GO_UP    ; 254
-	const GO_LEFT  ; 253
-	const GO_RIGHT ; 252
-DEF NEXT_SPACE_IS_ANCHOR_POINT EQU const_value + 1
-
 ; Branch Space special direction values
-DEF BRANCH_DIRECTION_INVALID     EQU -1
-DEF BRANCH_DIRECTION_UNAVAILABLE EQU -2
+	const_def -1, -1
+	const BRANCH_DIRECTION_INVALID     ; -1
+	const BRANCH_DIRECTION_UNAVAILABLE ; -2
+
+; reserved next space values that signal movement towards anchor point rather than towards space.
+; must not overlap with BRANCH_DIRECTION_* constants in order to support GO_* values as next spaces of a branch direction.
+	const GO_DOWN  ; 253
+	const GO_UP    ; 252
+	const GO_LEFT  ; 251
+	const GO_RIGHT ; 250
+DEF NEXT_SPACE_IS_ANCHOR_POINT EQU const_value + 1