diff --git a/libavcodec/mpeg12.c b/libavcodec/mpeg12.c
index 671406746b..0cf9aa1843 100644
--- a/libavcodec/mpeg12.c
+++ b/libavcodec/mpeg12.c
@@ -1288,7 +1288,7 @@ static int mpeg_decode_postinit(AVCodecContext *avctx){
         s1->save_width != s->width ||
         s1->save_height != s->height ||
         s1->save_aspect_info != s->aspect_ratio_info||
-        s1->save_progressive_seq != s->progressive_sequence ||
+        (s1->save_progressive_seq != s->progressive_sequence && (s->height&31)) ||
         0)
     {