diff --git a/src/www/vpn_pppoe_edit.php b/src/www/vpn_pppoe_edit.php
index f547e6af3..c04831412 100644
--- a/src/www/vpn_pppoe_edit.php
+++ b/src/www/vpn_pppoe_edit.php
@@ -50,7 +50,7 @@ function vpn_pppoe_get_id()
     return $vpnid;
 }
 
-if (!is_array($config['pppoes']['pppoe'])) {
+if (!isset($config['pppoes']['pppoe'])) {
     $config['pppoes']['pppoe'] = array();
 }
 $a_pppoes = &$config['pppoes']['pppoe'];