diff --git a/library/Icinga/Web/Cookie.php b/library/Icinga/Web/Cookie.php
index aaef3006d..54ad3079f 100644
--- a/library/Icinga/Web/Cookie.php
+++ b/library/Icinga/Web/Cookie.php
@@ -96,6 +96,9 @@ class Cookie
      */
     public function getDomain()
     {
+        if ($this->domain === null) {
+            $this->domain = Config::app()->get('cookie', 'domain');
+        }
         return $this->domain;
     }