[Twisted-web] XML-RPC and None

Hello. We're using twisted.web.xmlrpc to serve an xmlrpclib client, so python-to-python. We'd like to pass None through the rpc connection on occasion. There's a flag in the standard lib to allow this to serialize ( send allow_none=True to the xmlrpclib.Server() ) We're getting this error from the twisted resource when we try to serialize 'None': Fault: <Fault 8002: "can't serialize output"> I know that the twisted resources uses the stock xmlrpclib, but how can we tell it to allow None to serialize the twisted way? Thanks.