diff --git a/module/VuFind/src/VuFind/View/Helper/Root/Overdrive.php b/module/VuFind/src/VuFind/View/Helper/Root/Overdrive.php
index 8be2eaa3a2ed7e05874208eb88182023ab6c9c53..13441d2e1b03bde4d3a36d901afa228155a97999 100644
--- a/module/VuFind/src/VuFind/View/Helper/Root/Overdrive.php
+++ b/module/VuFind/src/VuFind/View/Helper/Root/Overdrive.php
@@ -96,6 +96,6 @@ class Overdrive extends \Zend\View\Helper\AbstractHelper
             return false;
         }
         $config = $this->connector->getConfig();
-        return (bool)$config->showOverdriveAdminMenu ?? false;
+        return (bool)($config->showOverdriveAdminMenu ?? false);
     }
 }