diff --git a/src/music/dmusic.h b/src/music/dmusic.h
--- a/src/music/dmusic.h
+++ b/src/music/dmusic.h
@@ -1,5 +1,7 @@
 /* $Id$ */
 
+/** @file dmusic.h Base of playing music via DirectMusic.
+
 #ifndef MUSIC_DMUSIC_H
 #define MUSIC_DMUSIC_H