diff --git a/engine/battle/ai/redundant.asm b/engine/battle/ai/redundant.asm
index bb7ee8b66..bb9338fb7 100644
--- a/engine/battle/ai/redundant.asm
+++ b/engine/battle/ai/redundant.asm
@@ -113,7 +113,7 @@ AI_Redundant:
 
 .Nightmare:
 	ld a, [wBattleMonStatus]
-	and SLP_MASK
+	and a
 	jr z, .Redundant
 	ld a, [wPlayerSubStatus1]
 	bit SUBSTATUS_NIGHTMARE, a