--- a/mod_pubsub_feeds/mod_pubsub_feeds.lua	Mon Dec 19 07:47:50 2016 +0100
+++ b/mod_pubsub_feeds/mod_pubsub_feeds.lua	Mon Dec 19 07:48:48 2016 +0100
@@ -217,6 +217,7 @@
 
 	local feed = feed_list[query.node];
 	if not feed then
+		module:log("debug", "Push for unknown feed %s -- %s", query["hub.topic"], formencode(query));
 		return 404;
 	end