--- a/util/xmppstream.lua	Tue Feb 02 22:16:20 2021 +0100
+++ b/util/xmppstream.lua	Wed Feb 03 16:14:43 2021 +0100
@@ -262,7 +262,7 @@
 			["xml:lang"] = "en",
 			xmlns = stream_callbacks.default_ns,
 			version = session.version and (session.version > 0 and "1.0" or nil),
-			id = session.streamid,
+			id = session.streamid or "",
 			from = from or session.host, to = to,
 		};
 		if session.stream_attrs then