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-rw-r--r--sleekxmpp/thirdparty/statemachine.py3
1 files changed, 2 insertions, 1 deletions
diff --git a/sleekxmpp/thirdparty/statemachine.py b/sleekxmpp/thirdparty/statemachine.py
index 4b5ecd6b..113320fa 100644
--- a/sleekxmpp/thirdparty/statemachine.py
+++ b/sleekxmpp/thirdparty/statemachine.py
@@ -15,7 +15,8 @@ log = logging.getLogger(__name__)
class StateMachine(object):
- def __init__(self, states=[]):
+ def __init__(self, states=None):
+ if not states: states = []
self.lock = threading.Condition()
self.__states = []
self.addStates(states)