--- a/mod_firewall/definitions.lib.lua	Thu Sep 17 20:51:55 2015 +0200
+++ b/mod_firewall/definitions.lib.lua	Fri Sep 18 15:27:53 2015 +0200
@@ -1,6 +1,7 @@
 
 local definition_handlers = {};
 
+local set = require"util.set";
 local new_throttle = require "util.throttle".create;
 
 function definition_handlers.ZONE(zone_name, zone_members)