Exception in connection,open when using sasl_max_ssf option

Here is the code instace:
import qpid.messaging

conn = qpid.messaging.Connection(host='select_your_name',
port=5672,
username=None,
password=None,
sasl_max_ssf=0,
sasl_mechanisms=['GSSAPI'],
reconnect=True,
reconnect_interval=60,
)
conn.open()

print "OPEN"

conn.close()

Here is the output it produces:
python ct.py
Traceback (most recent call last):
File "ct.py", line 12, in <module>
conn.open()
File "<string>", line 6, in open
File "/opt/enstore/Python/lib/python2.7/site-packages/qpid/messaging/endpoints.py", line 283, in open
self.attach(timeout=timeout)
File "<string>", line 6, in attach
File "/opt/enstore/Python/lib/python2.7/site-packages/qpid/messaging/endpoints.py", line 301, in attach
if not self._ewait(lambda: self._transport_connected and not self._unlinked(), timeout=timeout):
File "/opt/enstore/Python/lib/python2.7/site-packages/qpid/messaging/endpoints.py", line 234, in _ewait
self.check_error()
File "/opt/enstore/Python/lib/python2.7/site-packages/qpid/messaging/endpoints.py", line 227, in check_error
raise e
qpid.messaging.exceptions.InternalError: Traceback (most recent call last):
File "/opt/enstore/Python/lib/python2.7/site-packages/qpid/messaging/driver.py", line 526, in dispatch
self.connect()
File "/opt/enstore/Python/lib/python2.7/site-packages/qpid/messaging/driver.py", line 548, in connect
self.engine = Engine(self.connection)
File "/opt/enstore/Python/lib/python2.7/site-packages/qpid/messaging/driver.py", line 630, in _init_
self._sasl.setAttr("maxssf", self.connection.sasl_max_ssf)
File "/opt/enstore/Python/lib/python2.7/site-packages/qpid/sasl.py", line 39, in setAttr
raise SASLError(self._cli.getError())
SASLError: Error in setAttr (-1) Unknown string attribute name - maxssf

I did not specify version because it produces the same result for 0.14 .32 and 0.34