diff --git a/libavcodec/h263dec.c b/libavcodec/h263dec.c
index f9680052c2cdc1a0a6e0e02e7b99de3bb34d16ae..67d7deede16fed3d88bfb61f07a1218ef7e18cb9 100644
--- a/libavcodec/h263dec.c
+++ b/libavcodec/h263dec.c
@@ -628,7 +628,7 @@ retry:
 #ifdef HAVE_MMX
     if(s->codec_id == CODEC_ID_MPEG4 && s->xvid_build && avctx->idct_algo == FF_IDCT_AUTO && (mm_flags & MM_MMX) && !(s->flags&CODEC_FLAG_BITEXACT)){
         avctx->idct_algo= FF_IDCT_LIBMPEG2MMX;
-        avctx->width= 0; // force reinit
+        avctx->coded_width= 0; // force reinit
     }
 #endif