diff --git a/libavformat/rtp.h b/libavformat/rtp.h
index 946d325288..cdd911e5e3 100644
--- a/libavformat/rtp.h
+++ b/libavformat/rtp.h
@@ -27,7 +27,7 @@
 int rtp_init(void);
 int rtp_get_codec_info(AVCodecContext *codec, int payload_type);
 
-/* return < 0 if unknown payload type */
+/** return < 0 if unknown payload type */
 int rtp_get_payload_type(AVCodecContext *codec);
 
 typedef struct RTPDemuxContext RTPDemuxContext;