diff --git a/websocket/_utils.py b/websocket/_utils.py
index 91be861..f431702 100644
--- a/websocket/_utils.py
+++ b/websocket/_utils.py
@@ -28,7 +28,7 @@ class NoLock(object):
     def __enter__(self):
         pass
 
-    def __exit__(self, type, value, traceback):
+    def __exit__(self, exc_type, exc_value, traceback):
         pass
 
 try: