diff --git a/libavformat/isom.c b/libavformat/isom.c
index 9945fa295b..ea20c3c773 100644
--- a/libavformat/isom.c
+++ b/libavformat/isom.c
@@ -204,7 +204,7 @@ const AVCodecTag codec_movvideo_tags[] = {
 
     { CODEC_ID_DIRAC, MKTAG('d', 'r', 'a', 'c') },
     { CODEC_ID_DNXHD, MKTAG('A', 'V', 'd', 'n') }, /* AVID DNxHD */
-    { CODEC_ID_FLV1,  MKTAG('H', '2', '6', '3') }, /* Flash Media Server */
+//  { CODEC_ID_FLV1,  MKTAG('H', '2', '6', '3') }, /* Flash Media Server */
     { CODEC_ID_MSMPEG4V3, MKTAG('3', 'I', 'V', 'D') }, /* 3ivx DivX Doctor */
     { CODEC_ID_RAWVIDEO, MKTAG('A', 'V', '1', 'x') }, /* AVID 1:1x */
     { CODEC_ID_RAWVIDEO, MKTAG('A', 'V', 'u', 'p') },