diff --git a/src/etc/inc/system.inc b/src/etc/inc/system.inc
index 1c91a4e36..dbe3a7514 100644
--- a/src/etc/inc/system.inc
+++ b/src/etc/inc/system.inc
@@ -418,6 +418,7 @@ function get_nameservers($interface = null, $with_gateway = false)
 
         $gwkey = "dns{$dnscounter}gw";
         $gateway = null;
+        $dnsif = null;
 
         if (!empty($syscfg[$gwkey]) && $syscfg[$gwkey] != 'none') {
             /* if a gateway is attached figure out the interface and address */