diff --git a/library/Icinga/Web/Controller/ModuleActionController.php b/library/Icinga/Web/Controller/ModuleActionController.php
index 38826a84c..2cb5f62bc 100644
--- a/library/Icinga/Web/Controller/ModuleActionController.php
+++ b/library/Icinga/Web/Controller/ModuleActionController.php
@@ -26,7 +26,7 @@ class ModuleActionController extends ActionController
     protected function prepareInit()
     {
         $this->moduleInit();
-        if ($this->requiresLogin()
+        if (($this->Auth()->isAuthenticated() || $this->requiresLogin())
             && $this->getFrontController()->getDefaultModule() !== $this->getModuleName()) {
             $this->assertPermission(Manager::MODULE_PERMISSION_NS . $this->getModuleName());
         }