diff --git a/paddlehub/common/lock.py b/paddlehub/common/lock.py
index b2243d5ccff3e7bd6db6a6cf4789ae22a29f7e25..c5461ea8dfe95dd1153a8d862235332ac6286219 100644
--- a/paddlehub/common/lock.py
+++ b/paddlehub/common/lock.py
@@ -9,7 +9,6 @@ class WinLock(object):
     def __init__(self):
         self.LOCK_EX = ""
         self.LOCK_UN = ""
-        self.LOCK_EE = ""
 
 
 class Lock(object):