diff --git a/src/etc/inc/filter.inc b/src/etc/inc/filter.inc
index 94c1144128..c5cde7bd5d 100644
--- a/src/etc/inc/filter.inc
+++ b/src/etc/inc/filter.inc
@@ -665,8 +665,8 @@ function filter_generate_nested_alias_recurse($name, $alias, &$aliasnesting, &$a
 			}
 		} else if (!isset($aliasaddrnesting[$address])) {
 			if (!is_ipaddr($address) && !is_subnet($address) && !((($alias_type == 'port') || ($alias_type == 'url_ports')) && is_port_or_range($address)) && is_hostname($address)) {
+				$use_filterdns = true;
 				if (!isset($filterdns["{$address}{$name}"])) {
-					$use_filterdns = true;
 					$filterdns["{$address}{$name}"] = "pf {$address} {$name}\n";
 				}
 				continue;