diff --git a/PCbuild/BUILDno.txt b/PCbuild/BUILDno.txt
index 093065f8ef2..37d59780437 100644
--- a/PCbuild/BUILDno.txt
+++ b/PCbuild/BUILDno.txt
@@ -33,6 +33,8 @@ How to change the Windows build number:
 
 Windows Python BUILD numbers
 ----------------------------
+  55    2.4.0a2
+        4-Aug-2004
   54    2.4.0a1
         8-Jul-2004
   53    2.3.4 (final)
diff --git a/PCbuild/pythoncore.vcproj b/PCbuild/pythoncore.vcproj
index 07c8a088935..1e5617c6d21 100644
--- a/PCbuild/pythoncore.vcproj
+++ b/PCbuild/pythoncore.vcproj
@@ -1382,7 +1382,7 @@
 					Name="VCCLCompilerTool"
 					Optimization="2"
 					AdditionalIncludeDirectories=""
-					PreprocessorDefinitions="BUILD=54"/>
+					PreprocessorDefinitions="BUILD=55"/>
 			</FileConfiguration>
 			<FileConfiguration
 				Name="Debug|Win32">
@@ -1390,7 +1390,7 @@
 					Name="VCCLCompilerTool"
 					Optimization="0"
 					AdditionalIncludeDirectories=""
-					PreprocessorDefinitions="BUILD=54"/>
+					PreprocessorDefinitions="BUILD=55"/>
 			</FileConfiguration>
 			<FileConfiguration
 				Name="ReleaseItanium|Win32">
@@ -1398,7 +1398,7 @@
 					Name="VCCLCompilerTool"
 					Optimization="2"
 					AdditionalIncludeDirectories=""
-					PreprocessorDefinitions="BUILD=46"/>
+					PreprocessorDefinitions="BUILD=55"/>
 			</FileConfiguration>
 		</File>
 		<File