diff --git a/Objects/typeslots.py b/Objects/typeslots.py
index 0e6ef1f9b82..686fb6fcf6e 100644
--- a/Objects/typeslots.py
+++ b/Objects/typeslots.py
@@ -3,6 +3,7 @@
 
 import sys, re
 
+print("/* Generated by typeslots.py $Revision$ */")
 res = {}
 for line in sys.stdin:
     m = re.match("#define Py_([a-z_]+) ([0-9]+)", line)