diff --git a/libavformat/isom.c b/libavformat/isom.c
index c65f9317e7..dd4008b69b 100644
--- a/libavformat/isom.c
+++ b/libavformat/isom.c
@@ -83,6 +83,7 @@ const AVCodecTag codec_movvideo_tags[] = {
     { CODEC_ID_RAWVIDEO, MKTAG('b', '4', '8', 'r') },
 
     { CODEC_ID_R10K,   MKTAG('R', '1', '0', 'k') }, /* UNCOMPRESSED 10BIT RGB */
+    { CODEC_ID_R10K,   MKTAG('R', '1', '0', 'g') }, /* UNCOMPRESSED 10BIT RGB */
     { CODEC_ID_R210,   MKTAG('r', '2', '1', '0') }, /* UNCOMPRESSED 10BIT RGB */
     { CODEC_ID_V210,   MKTAG('v', '2', '1', '0') }, /* UNCOMPRESSED 10BIT 4:2:2 */