diff --git a/src/tz/templates/tz/set_utc_offset.html b/src/tz/templates/tz/set_utc_offset.html
index d9ea348..0a639a6 100644
--- a/src/tz/templates/tz/set_utc_offset.html
+++ b/src/tz/templates/tz/set_utc_offset.html
@@ -1,4 +1,4 @@
 <script type="text/javascript">
   var date = new Date();
-  $.cookie('utc_offset', getTimezoneOffset());
+  $.cookie('utc_offset', date.getTimezoneOffset());
 </script>
--
libgit2 0.21.2