diff --git a/libavcodec/mpeg_er.c b/libavcodec/mpeg_er.c
index 5eca834072a04845d224c823c735817c8513e6fc..ada1a1692f339687283f0a082c0bd09d235ed31e 100644
--- a/libavcodec/mpeg_er.c
+++ b/libavcodec/mpeg_er.c
@@ -71,6 +71,7 @@ static void mpeg_er_decode_mb(void *opaque, int ref, int mv_dir, int mv_type,
     s->mb_skipped = mb_skipped;
     s->mb_x       = mb_x;
     s->mb_y       = mb_y;
+    s->mcsel      = 0;
     memcpy(s->mv, mv, sizeof(*mv));
 
     ff_init_block_index(s);