diff --git a/Assets/Fumi/Scripts/Common/AudioSourceExtension.cs b/Assets/Fumi/Scripts/Common/AudioSourceExtension.cs
index 5f1befa..767fc28 100644
--- a/Assets/Fumi/Scripts/Common/AudioSourceExtension.cs
+++ b/Assets/Fumi/Scripts/Common/AudioSourceExtension.cs
@@ -23,7 +23,7 @@ public static IEnumerator Fade(this AudioSource audio, float to, float duration)
             audio.volume = volume;
             if (t == 1.0f)
             {
-                yield break;
+                break;
             }
             yield return null;
         }