diff --git a/OngekiScoreLog/app/Services/OngekiUtility.php b/OngekiScoreLog/app/Services/OngekiUtility.php
index fe3af997..8ec1156d 100644
--- a/OngekiScoreLog/app/Services/OngekiUtility.php
+++ b/OngekiScoreLog/app/Services/OngekiUtility.php
@@ -106,8 +106,7 @@ public function RateValueFromTitle(string $title, $difficulty, int $technicalSco
             throw new \OutOfBoundsException("title: " . $title . " / artist:" . $artist . " / difficulty:" . $difficulty);
         }
 
-        $difficulty = "lunatic_extra_level";
-        if(!array_key_exists($difficulty, $this::$MusicList[$title])){
+        if($this::$MusicList[$title][$difficulty] === null){
             // なんか存在しない難易度の定数値取ろうとしてる
             // 既に入ってる曲に後からlunatic追加されると起きがち
             return 0;