diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index b2a8e4c33e..4bedecf9e1 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -209,6 +209,7 @@ enum CodecID {
     CODEC_ID_JV,
     CODEC_ID_DFA,
     CODEC_ID_8SVX_RAW,
+    CODEC_ID_G2M,
 
     /* various PCM "codecs" */
     CODEC_ID_PCM_S16LE= 0x10000,