diff --git a/PCbuild/BUILDno.txt b/PCbuild/BUILDno.txt
index e6a50e6e163..a657e1cd56c 100644
--- a/PCbuild/BUILDno.txt
+++ b/PCbuild/BUILDno.txt
@@ -33,6 +33,8 @@ How to change the Windows build number:
 
 Windows Python BUILD numbers
 ----------------------------
+  38    2.3a1
+        31-Dec-2002
   37    2.2.2 (final)
         14-Oct-2002
   36    2.2.2b1
diff --git a/PCbuild/pythoncore.dsp b/PCbuild/pythoncore.dsp
index 0c5d43db7a3..5a84506b1cb 100644
--- a/PCbuild/pythoncore.dsp
+++ b/PCbuild/pythoncore.dsp
@@ -258,7 +258,7 @@ SOURCE=..\Python\getargs.c
 # Begin Source File
 
 SOURCE=..\Modules\getbuildinfo.c
-# ADD CPP /D BUILD=29
+# ADD CPP /D BUILD=38
 # End Source File
 # Begin Source File