diff --git a/src/media/media_decoder.h b/src/media/media_decoder.h
index e8893c319ed64b40c6f244b0a262d82511c53ab3..748470b1fd0a918d61914d275649a588a9a86859 100644
--- a/src/media/media_decoder.h
+++ b/src/media/media_decoder.h
@@ -52,7 +52,7 @@ struct AVCodec;
 enum AVMediaType;
 
 namespace DRing {
-struct AudioFrame;
+class AudioFrame;
 }
 
 namespace ring {