diff --git a/libavcodec/h263.c b/libavcodec/h263.c
index 09049c1d22..8fb9c06b75 100644
--- a/libavcodec/h263.c
+++ b/libavcodec/h263.c
@@ -4644,6 +4644,10 @@ int intel_h263_decode_picture_header(MpegEncContext *s)
         skip_bits(&s->gb, 8);
     }
     s->f_code = 1;
+
+    s->y_dc_scale_table=
+    s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
+
     return 0;
 }