diff --git a/tutorial/py/PythonServer.py b/tutorial/py/PythonServer.py
index 63f993b..cf2aab2 100755
--- a/tutorial/py/PythonServer.py
+++ b/tutorial/py/PythonServer.py
@@ -81,7 +81,7 @@
 
 handler = CalculatorHandler()
 processor = Calculator.Processor(handler)
-transport = TSocket.TServerSocket(9090)
+transport = TSocket.TServerSocket(port=9090)
 tfactory = TTransport.TBufferedTransportFactory()
 pfactory = TBinaryProtocol.TBinaryProtocolFactory()