--- a/mod_presence_dedup/mod_presence_dedup.lua	Wed Jan 16 17:30:23 2019 +0100
+++ b/mod_presence_dedup/mod_presence_dedup.lua	Thu Jan 17 19:06:51 2019 +0100
@@ -38,7 +38,7 @@
 end
 
 module:hook("presence/initial",	function (event)
-	local session, stanza = event.origin, event.stanza;
+	local session = event.origin;
 	session.presence_cache = cache.new(cache_size);
 	add_filter(session, "stanzas/out", dedup_presence, 90);
 end);