diff --git a/libavcodec/intelh263dec.c b/libavcodec/intelh263dec.c
index 179f609de6..ffe91dbd5d 100644
--- a/libavcodec/intelh263dec.c
+++ b/libavcodec/intelh263dec.c
@@ -77,7 +77,7 @@ int ff_intel_h263_decode_picture_header(MpegEncContext *s)
         }
         if(get_bits(&s->gb, 2))
             av_log(s->avctx, AV_LOG_ERROR, "Bad value for reserved field\n");
-        s->loop_filter = get_bits1(&s->gb);
+        s->loop_filter = get_bits1(&s->gb) * !s->avctx->lowres;
         if(get_bits1(&s->gb))
             av_log(s->avctx, AV_LOG_ERROR, "Bad value for reserved field\n");
         if(get_bits1(&s->gb))
diff --git a/libavcodec/ituh263dec.c b/libavcodec/ituh263dec.c
index 34a9e816ae..58375becc9 100644
--- a/libavcodec/ituh263dec.c
+++ b/libavcodec/ituh263dec.c
@@ -963,6 +963,8 @@ int ff_h263_decode_picture_header(MpegEncContext *s)
             s->h263_aic = get_bits1(&s->gb); /* Advanced Intra Coding (AIC) */
             s->loop_filter= get_bits1(&s->gb);
             s->unrestricted_mv = s->umvplus || s->obmc || s->loop_filter;
+            if(s->avctx->lowres)
+                s->loop_filter = 0;
 
             s->h263_slice_structured= get_bits1(&s->gb);
             if (get_bits1(&s->gb) != 0) {