diff -r b37ccf9bec89 -r 2919f3b985fc plugins/muc/mod_muc.lua
--- a/plugins/muc/mod_muc.lua	Mon Sep 07 20:27:52 2009 +0500
+++ b/plugins/muc/mod_muc.lua	Mon Sep 07 20:29:04 2009 +0500
@@ -20,6 +20,7 @@
 local deregister_component = require "core.componentmanager".deregister_component;
 local jid_split = require "util.jid".split;
 local st = require "util.stanza";
+local uuid_gen = require "util.uuid".generate;
 
 local rooms = {};
 local component;
@@ -48,6 +49,8 @@
 			origin.send(get_disco_info(stanza));
 		elseif xmlns == "http://jabber.org/protocol/disco#items" then
 			origin.send(get_disco_items(stanza));
+		elseif xmlns == "http://jabber.org/protocol/muc#unique" then
+			origin.send(st.reply(stanza):tag("unique", {xmlns = xmlns}):text(uuid_gen())); -- FIXME Random UUIDs can theoretically have collisions
 		else
 			origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); -- TODO disco/etc
 		end