diff --git a/PCbuild/BUILDno.txt b/PCbuild/BUILDno.txt
index 42aaeb4bd78..ea927b35b8c 100644
--- a/PCbuild/BUILDno.txt
+++ b/PCbuild/BUILDno.txt
@@ -33,6 +33,8 @@ How to change the Windows build number:
 
 Windows Python BUILD numbers
 ----------------------------
+  41    2.2.3c1
+        22-May-2003
   40    2.3b1
         25-Apr-2003
   39    2.3a2