diff --git a/libraries/classes/Header.php b/libraries/classes/Header.php
index 07af57c6f2..2c3f418a1b 100644
--- a/libraries/classes/Header.php
+++ b/libraries/classes/Header.php
@@ -252,7 +252,7 @@ class Header
             'confirm' => $GLOBALS['cfg']['Confirm'],
             'LoginCookieValidity' => $GLOBALS['cfg']['LoginCookieValidity'],
             'session_gc_maxlifetime' => (int)@ini_get('session.gc_maxlifetime'),
-            'logged_in' => $GLOBALS['dbi']->isUserType('logged'),
+            'logged_in' => (isset($GLOBALS['dbi']) ? $GLOBALS['dbi']->isUserType('logged') : false),
             'is_https' => $GLOBALS['PMA_Config']->isHttps(),
             'rootPath' => $GLOBALS['PMA_Config']->getRootPath(),
             'PMA_VERSION' => PMA_VERSION