diff --git a/src/www/vpn_l2tp.php b/src/www/vpn_l2tp.php
index 765ed3b4d..220f257c4 100644
--- a/src/www/vpn_l2tp.php
+++ b/src/www/vpn_l2tp.php
@@ -34,7 +34,7 @@ require_once("vpn.inc");
 require_once("pfsense-utils.inc");
 require_once("interfaces.inc");
 
-if (!is_array($config['l2tp']['radius'])) {
+if (!isset($config['l2tp']['radius']) || !is_array($config['l2tp']['radius'])) {
     $config['l2tp']['radius'] = array();
 }
 $l2tpcfg = &$config['l2tp'];