diff --git a/sleekxmpp/xmlstream/xmlstream.py b/sleekxmpp/xmlstream/xmlstream.py
index 6ce89c25..94fed64a 100644
--- a/sleekxmpp/xmlstream/xmlstream.py
+++ b/sleekxmpp/xmlstream/xmlstream.py
@@ -24,6 +24,7 @@ import copy
 import xml.sax.saxutils
 from . import scheduler
 
+RESPONSE_TIMEOUT = 10
 HANDLER_THREADS = 1
 
 ssl_support = True