diff --git a/libavformat/mp3.c b/libavformat/mp3.c
index 3ee3cb2a8a..dcb59e8417 100644
--- a/libavformat/mp3.c
+++ b/libavformat/mp3.c
@@ -360,6 +360,7 @@ AVOutputFormat mp3_muxer = {
     mp3_write_header,
     mp3_write_packet,
     mp3_write_trailer,
+    AVFMT_NOTIMESTAMPS,
     .metadata_conv = ff_id3v2_metadata_conv,
 };
 #endif