diff --git a/libavformat/raw.c b/libavformat/raw.c
index 7837de842a..85d204d7e3 100644
--- a/libavformat/raw.c
+++ b/libavformat/raw.c
@@ -283,6 +283,7 @@ static int video_read_header(AVFormatContext *s,
                 st->codec->codec_id == CODEC_ID_MPEG4 ||
                 st->codec->codec_id == CODEC_ID_DIRAC ||
                 st->codec->codec_id == CODEC_ID_DNXHD ||
+                st->codec->codec_id == CODEC_ID_VC1   ||
                 st->codec->codec_id == CODEC_ID_H264) {
         st->codec->time_base= (AVRational){1,25};
     }