diff --git a/libavcodec/ituh263dec.c b/libavcodec/ituh263dec.c
index 73aaa1daf8..9a2c8e6c42 100644
--- a/libavcodec/ituh263dec.c
+++ b/libavcodec/ituh263dec.c
@@ -524,7 +524,7 @@ retry:
                     }else{
                         level = SHOW_UBITS(re, &s->gb, 5);
                         SKIP_CACHE(re, &s->gb, 5);
-                        level |= SHOW_SBITS(re, &s->gb, 6)<<5;
+                        level |= SHOW_SBITS(re, &s->gb, 6) * (1<<5);
                         SKIP_COUNTER(re, &s->gb, 5 + 6);
                     }
                 }