diff --git a/poezio/multiuserchat.py b/poezio/multiuserchat.py
index ed254d37..1ed2fa23 100644
--- a/poezio/multiuserchat.py
+++ b/poezio/multiuserchat.py
@@ -190,7 +190,7 @@ def configure_room(xmpp, room, form):
     iq['to'] = room
     query = ET.Element('{http://jabber.org/protocol/muc#owner}query')
     form['type'] = 'submit'
-    query.append(form)
+    query.append(form.xml)
     iq.append(query)
     iq.send()