diff --git a/etc/inc/util.inc b/etc/inc/util.inc
index e99b2278a3..f2889d381f 100644
--- a/etc/inc/util.inc
+++ b/etc/inc/util.inc
@@ -592,7 +592,7 @@ function get_configured_interface_list($only_opt = false, $withdisabled = false)
 
 	$iflist = array();
 
-	if(!$is_array['interfaces'])
+	if(!is_array($config['interfaces']))
 		$config = parse_config(true);
 
 	/* if list */