diff --git a/fetapdtest.py b/fetapdtest.py
index 099d1b9..949de64 100644
--- a/fetapdtest.py
+++ b/fetapdtest.py
@@ -226,7 +226,7 @@ class StateMachineController(object):
 		self.__evqueue.put((evname, evargs, evkwargs))
 
 	def set_timeout(self, timeout):
-		self.__timeout = threading.Timer(timeout/1000, lambda: self.queue_event('timeout'))
+		self.__timeout = threading.Timer(timeout/1000, self.queue_event, args=['timeout'])
 		self.__timeout.start()
 
 	def abort_timeout(self):