diff --git a/Lib/multiprocessing/managers.py b/Lib/multiprocessing/managers.py
index 1f9c2daa25d..a39efd7c09c 100644
--- a/Lib/multiprocessing/managers.py
+++ b/Lib/multiprocessing/managers.py
@@ -874,7 +874,6 @@ class BaseProxy(object):
             del tls.connection
 
     def _after_fork(self):
-        self._manager = None
         try:
             self._incref()
         except Exception as e: