diff -r 224e681c4db2 -r dd7e924c74ef plugins/muc/history.lib.lua
--- a/plugins/muc/history.lib.lua	Tue Jul 30 08:01:22 2019 +0200
+++ b/plugins/muc/history.lib.lua	Sat Aug 31 16:08:45 2019 +0200
@@ -178,10 +178,10 @@
 	local ts = gettime();
 	local stamp = datetime.datetime(ts);
 	stanza:tag("delay", { -- XEP-0203
-		xmlns = "urn:xmpp:delay", from = module.host, stamp = stamp
+		xmlns = "urn:xmpp:delay", from = room.jid, stamp = stamp
 	}):up();
 	stanza:tag("x", { -- XEP-0091 (deprecated)
-		xmlns = "jabber:x:delay", from = module.host, stamp = datetime.legacy()
+		xmlns = "jabber:x:delay", from = room.jid, stamp = datetime.legacy()
 	}):up();
 	local entry = { stanza = stanza, timestamp = ts };
 	table.insert(history, entry);