diff --git a/constants/move_constants.asm b/constants/move_constants.asm
index 6112966cb..6e79b2e4b 100644
--- a/constants/move_constants.asm
+++ b/constants/move_constants.asm
@@ -259,6 +259,8 @@
 	const BEAT_UP      ; fb
 DEF NUM_ATTACKS EQU const_value - 1
 
+DEF CANNOT_MOVE EQU $ff
+
 ; Battle animations use the same constants as the moves up to this point
 	const_next $ff
 	const ANIM_SWEET_SCENT_2     ; ff
diff --git a/engine/battle/core.asm b/engine/battle/core.asm
index 45a1bb57a..f70caab92 100644
--- a/engine/battle/core.asm
+++ b/engine/battle/core.asm
@@ -4175,7 +4175,7 @@ PursuitSwitch:
 
 	ld a, BATTLE_VARS_MOVE
 	call GetBattleVarAddr
-	ld a, $ff
+	ld a, CANNOT_MOVE
 	ld [hl], a
 
 	pop af
diff --git a/engine/battle/effect_commands.asm b/engine/battle/effect_commands.asm
index 39019fb40..3ad991425 100644
--- a/engine/battle/effect_commands.asm
+++ b/engine/battle/effect_commands.asm
@@ -111,9 +111,9 @@ CheckTurn:
 BattleCommand_CheckTurn:
 ; Repurposed as hardcoded turn handling. Useless as a command.
 
-; Move $ff immediately ends the turn.
 	ld a, BATTLE_VARS_MOVE
 	call GetBattleVar
+	assert CANNOT_MOVE == $ff
 	inc a
 	jp z, EndTurn