diff --git a/libavformat/utils.c b/libavformat/utils.c
index a071070cad..58b3584c1d 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -1884,6 +1884,7 @@ static int has_codec_parameters(AVCodecContext *enc)
         if(!enc->frame_size &&
            (enc->codec_id == CODEC_ID_VORBIS ||
             enc->codec_id == CODEC_ID_AAC ||
+            enc->codec_id == CODEC_ID_MP3 ||
             enc->codec_id == CODEC_ID_SPEEX))
             return 0;
         break;