diff --git a/libavformat/riff.c b/libavformat/riff.c
index 508beb1..b11bfb3 100644
--- a/libavformat/riff.c
+++ b/libavformat/riff.c
@@ -410,7 +410,7 @@ const AVMetadataConv ff_riff_info_conv[] = {
     { "IPRD", "album"     },
     { "IPRT", "track"     },
     { "ISFT", "encoder"   },
-    { "ISMP", "timecode"  },
+//    { "ISMP", "timecode"  },
     { "ITCH", "encoded_by"},
     { 0 },
 };