diff --git a/libavformat/rtp.c b/libavformat/rtp.c
index 919a4b59e0..e2ad11f5a7 100644
--- a/libavformat/rtp.c
+++ b/libavformat/rtp.c
@@ -207,7 +207,6 @@ int rtp_get_codec_info(AVCodecContext *codec, int payload_type)
     return -1;
 }
 
-/* return < 0 if unknown payload type */
 int rtp_get_payload_type(AVCodecContext *codec)
 {
     int i, payload_type;
diff --git a/libavformat/rtp.h b/libavformat/rtp.h
index d142fff5e1..d89bf82a8a 100644
--- a/libavformat/rtp.h
+++ b/libavformat/rtp.h
@@ -26,6 +26,8 @@
 
 int rtp_init(void);
 int rtp_get_codec_info(AVCodecContext *codec, int payload_type);
+
+/* return < 0 if unknown payload type */
 int rtp_get_payload_type(AVCodecContext *codec);
 
 typedef struct RTPDemuxContext RTPDemuxContext;