diff --git a/etc/inc/gwlb.inc b/etc/inc/gwlb.inc
index dd653c9b5e..03e308cc7f 100644
--- a/etc/inc/gwlb.inc
+++ b/etc/inc/gwlb.inc
@@ -696,6 +696,15 @@ function validate_address_family($ipaddr, $gwname) {
 		$v4gw = true;
 	if(is_ipaddrv6(lookup_gateway_ip_by_name($gwname)))
 		$v6gw = true;
+	/* are they dynamic */
+	switch($gwname) {
+		case "dynamic":
+			$v4gw = true;
+			break;
+		case "dynamic6":
+			$v6gw = true;
+			break;
+	}
 
 	if($v4ip && $v4gw)
 		return true;