diff --git a/netconf/nc_rpc/base/lock.py b/netconf/nc_rpc/base/lock.py
index 2f41e24..5a59376 100644
--- a/netconf/nc_rpc/base/lock.py
+++ b/netconf/nc_rpc/base/lock.py
@@ -1,6 +1,6 @@
 #!/usr/bin/env python
 #
-# Copyright 2016 the original author or authors.
+# Copyright 2017 the original author or authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -23,8 +23,8 @@
 
 class Lock(Rpc):
 
-	def __init__(self, request, grpc_client, session):
-		super(Lock, self).__init__(request, grpc_client, session)
+	def __init__(self, request, request_xml, grpc_client, session, capabilities):
+		super(Lock, self).__init__(request, request_xml, grpc_client, session)
 		self._validate_parameters()
 
 	def execute(self):