diff --git a/libavformat/avio.h b/libavformat/avio.h
index 84492d5a15..189c5f0e30 100644
--- a/libavformat/avio.h
+++ b/libavformat/avio.h
@@ -1,5 +1,4 @@
 /*
- * unbuffered io for ffmpeg system
  * copyright (c) 2001 Fabrice Bellard
  *
  * This file is part of FFmpeg.
@@ -21,6 +20,11 @@
 #ifndef AVFORMAT_AVIO_H
 #define AVFORMAT_AVIO_H
 
+/**
+ * @file libavformat/avio.h
+ * unbuffered I/O operations
+ */
+
 #include <stdint.h>
 
 #include "libavutil/common.h"