diff --git a/libavcodec/intelh263dec.c b/libavcodec/intelh263dec.c
index 5ed1cdba72..1a0dd59d6a 100644
--- a/libavcodec/intelh263dec.c
+++ b/libavcodec/intelh263dec.c
@@ -37,8 +37,7 @@ int ff_intel_h263_decode_picture_header(MpegEncContext *s)
     }
     s->picture_number = get_bits(&s->gb, 8); /* picture timestamp */
 
-    if (get_bits1(&s->gb) != 1) {
-        av_log(s->avctx, AV_LOG_ERROR, "Bad marker\n");
+    if (check_marker(&s->gb, "after picture_number") != 1) {
         return -1;      /* marker */
     }
     if (get_bits1(&s->gb) != 0) {
@@ -94,7 +93,7 @@ int ff_intel_h263_decode_picture_header(MpegEncContext *s)
     if(format == 6){
         int ar = get_bits(&s->gb, 4);
         skip_bits(&s->gb, 9); // display width
-        skip_bits1(&s->gb);
+        check_marker(&s->gb, "in dimensions");
         skip_bits(&s->gb, 9); // display height
         if(ar == 15){
             s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 8); // aspect ratio - width