diff --git a/libavformat/rtpenc.c b/libavformat/rtpenc.c
index 8664f46b66d474c67d4a3983fed25387efd2a955..a99fca0aed374860721c6db2e0176008de90d283 100644
--- a/libavformat/rtpenc.c
+++ b/libavformat/rtpenc.c
@@ -87,7 +87,7 @@ static int rtp_write_header(AVFormatContext *s1)
         return -1;
     st = s1->streams[0];
     if (!is_supported(st->codec->codec_id)) {
-        av_log(s1, AV_LOG_ERROR, "Unsupported codec %x\n", st->codec->codec_id);
+        av_log(s1, AV_LOG_ERROR, "Unsupported codec %s\n", avcodec_get_name(st->codec->codec_id));
 
         return -1;
     }