diff --git a/libavformat/udp.c b/libavformat/udp.c
index 65ec6ff7b8..aadda98bcd 100644
--- a/libavformat/udp.c
+++ b/libavformat/udp.c
@@ -18,6 +18,12 @@
  * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
+
+/**
+ * @file udp.c
+ * UDP protocol
+ */
+
 #include "avformat.h"
 #include <unistd.h>
 #include "network.h"