--- a/util/xmppstream.lua	Tue Apr 06 23:25:15 2021 +0200
+++ b/util/xmppstream.lua	Wed Apr 14 15:21:13 2021 +0200
@@ -268,8 +268,7 @@
 		if session.stream_attrs then
 			session:stream_attrs(from, to, attr)
 		end
-		send("<?xml version='1.0'?>");
-		send(st.stanza("stream:stream", attr):top_tag());
+		send("<?xml version='1.0'?>"..st.stanza("stream:stream", attr):top_tag());
 		return true;
 	end