diff --git a/ldap/files/dynldap.py b/ldap/files/dynldap.py
index 9770f07..d02ea46 100644
--- a/ldap/files/dynldap.py
+++ b/ldap/files/dynldap.py
@@ -199,7 +199,9 @@ class  LdapEntry:
                 self._conn._conn.add_s(self.dn, self.items())
             else:
                 self._conn._conn.modify_s(self.dn, changes)
-            self._orig = copy(self.__dict__)
+            self._orig = {}
+            for (k, v) in self.items():
+                self._orig[k] = v
 
 
 class Connection: