diff --git a/cocos/audio/include/AudioDecoderOgg.h b/cocos/audio/include/AudioDecoderOgg.h
index f837e3ffc4..080c1a81d9 100644
--- a/cocos/audio/include/AudioDecoderOgg.h
+++ b/cocos/audio/include/AudioDecoderOgg.h
@@ -68,7 +68,7 @@ protected:
     AudioDecoderOgg();
     ~AudioDecoderOgg();
 
-    FileStream* _fileStream;
+    FileStream* _fileStream = nullptr;
     OggVorbis_File _vf;
 
     friend class AudioDecoderManager;