diff --git a/plugins/password/password.php b/plugins/password/password.php
index f84dc8f0d82..520f2504e0a 100644
--- a/plugins/password/password.php
+++ b/plugins/password/password.php
@@ -369,7 +369,7 @@ private function check_host_login_exceptions()
 
         // Host exceptions
         $hosts = $rcmail->config->get('password_hosts');
-        if (!empty($hosts) && !in_array($_SESSION['storage_host'], $hosts)) {
+        if (!empty($hosts) && !in_array($_SESSION['storage_host'], (array) $hosts)) {
             return false;
         }