diff --git a/Lib/token.py b/Lib/token.py
index c4db6c5..8d5cdaa 100755
--- a/Lib/token.py
+++ b/Lib/token.py
@@ -71,6 +71,7 @@
 for _name, _value in globals().items():
     if type(_value) is type(0):
         tok_name[_value] = _name
+del _name, _value
 
 
 def ISTERMINAL(x):