diff --git a/module/VuFind/src/VuFind/ILS/Driver/Folio.php b/module/VuFind/src/VuFind/ILS/Driver/Folio.php
index 901b44c9a0a..335104ddbfc 100644
--- a/module/VuFind/src/VuFind/ILS/Driver/Folio.php
+++ b/module/VuFind/src/VuFind/ILS/Driver/Folio.php
@@ -908,7 +908,7 @@ protected function getUserWithCql($username, $password)
         $usernameField = $this->config['User']['username_field'] ?? 'username';
         $passwordField = $this->config['User']['password_field'] ?? false;
         if (
-            array_key_exists('shib_cql', $this->config['User'])
+            isset($this->config['User']['shib_cql'])
             && array_key_exists('Shib-Session-ID', $_SERVER)
         ) {
             $cql = $this->config['User']['shib_cql'];