diff --git a/multimedia/av_codec/native_avdemuxer.h b/multimedia/av_codec/native_avdemuxer.h
index 4e43b312a27dfc9e466f0015a19d867abd15a7af..b3a5fbf440141f3c068e874a6abe2d043e11cef5 100644
--- a/multimedia/av_codec/native_avdemuxer.h
+++ b/multimedia/av_codec/native_avdemuxer.h
@@ -64,7 +64,7 @@ typedef struct DRM_MediaKeySystemInfo DRM_MediaKeySystemInfo;
  * @useinstead Demuxer_MediaKeySystemInfoCallback
  * @since 11
  */
-typedef void (*DRM_MediaKeySystemInfoCallback)(DRM_MediaKeySystemInfo *mediaKeySystemInfo);
+typedef void (*DRM_MediaKeySystemInfoCallback)(DRM_MediaKeySystemInfo *mediaKeySystemInfo);///ddd
 
 /**
  * @brief Call back will be invoked when updating DRM information.