diff --git a/public/js/icinga/timezone.js b/public/js/icinga/timezone.js
index b23f0729e..15205e9cb 100644
--- a/public/js/icinga/timezone.js
+++ b/public/js/icinga/timezone.js
@@ -71,7 +71,7 @@
                 return;
             }
 
-            this.writeCookie(this.cookieName, timezoneOffset + ',' + Number(dst));
+            this.writeCookie(this.cookieName, timezoneOffset + ',' + Number(dst), 1);
         },
 
         /**