diff --git a/libavcodec/mpeg12.c b/libavcodec/mpeg12.c
index 1af8c3b4a1..5022f4807e 100644
--- a/libavcodec/mpeg12.c
+++ b/libavcodec/mpeg12.c
@@ -1981,7 +1981,7 @@ static int mpeg_decode_postinit(AVCodecContext *avctx){
     	(s1->mpeg_enc_ctx_allocated == 0)|| 
         avctx->coded_width  != s->width ||
         avctx->coded_height != s->height||
-//      s1->save_aspect_info != avctx->aspect_ratio_info||
+        s1->save_aspect_info != s->aspect_ratio_info||
         0)
     {