cbstats timings fails

/opt/couchbase/bin/cbstats localhost:11210 timings

Traceback (most recent call last):
  File "/opt/couchbase/lib/python/cbstats", line 356, in <module>
    main()
  File "/opt/couchbase/lib/python/cbstats", line 353, in main
    c.execute()
  File "/opt/couchbase/lib/python/clitool.py", line 43, in execute
    f[0](mc, *args[2:], **opts.__dict__)
  File "/opt/couchbase/lib/python/cbstats", line 38, in g
    f(*args[:n])
  File "/opt/couchbase/lib/python/cbstats", line 177, in stats_timings
    histograms(mc, mc.stats('timings'))
  File "/opt/couchbase/lib/python/cbstats", line 29, in g
    if kwargs['allBuckets']:
KeyError: 'allBuckets'