diff --git a/library/Icinga/Web/Controller/ActionController.php b/library/Icinga/Web/Controller/ActionController.php
index 571f0792f..dc7a7e21e 100644
--- a/library/Icinga/Web/Controller/ActionController.php
+++ b/library/Icinga/Web/Controller/ActionController.php
@@ -152,7 +152,7 @@ class ActionController extends Zend_Controller_Action
      */
     public function assertPermission($permission)
     {
-        if (! $this->Auth()->hasPermission($permission)) {
+        if ($this->requiresAuthentication && ! $this->Auth()->hasPermission($permission)) {
             throw new SecurityException('No permission for %s', $permission);
         }
     }