diff --git a/libavformat/av1dec.c b/libavformat/av1dec.c
index 38001b124f..536422959e 100644
--- a/libavformat/av1dec.c
+++ b/libavformat/av1dec.c
@@ -97,8 +97,6 @@ static int av1_read_header(AVFormatContext *s)
     if (ret < 0)
         return ret;
 
-    c->pos = avio_tell(s->pb);
-
     return 0;
 }