diff --git a/pep-0438.txt b/pep-0438.txt
index 52c1aacb2..17d9b7703 100644
--- a/pep-0438.txt
+++ b/pep-0438.txt
@@ -11,7 +11,7 @@ Content-Type: text/x-rst
 Created: 15-Mar-2013
 Post-History: 19-May-2013
 Resolution: http://mail.python.org/pipermail/distutils-sig/2013-May/020773.html
-Superseded-by: 470
+Superseded-By: 470
 
 
 Abstract