diff --git a/libavformat/gifdec.c b/libavformat/gifdec.c
index 706bc5a15a..46eef7ce0a 100644
--- a/libavformat/gifdec.c
+++ b/libavformat/gifdec.c
@@ -286,5 +286,6 @@ AVInputFormat ff_gif_demuxer = {
     .read_probe     = gif_probe,
     .read_header    = gif_read_header,
     .read_packet    = gif_read_packet,
+    .flags          = AVFMT_GENERIC_INDEX,
     .priv_class     = &demuxer_class,
 };