diff --git a/PC/VS9.0/_elementtree.vcproj b/PC/VS9.0/_elementtree.vcproj
index feb96ebe0ff57e..5e799557679fd8 100644
--- a/PC/VS9.0/_elementtree.vcproj
+++ b/PC/VS9.0/_elementtree.vcproj
@@ -43,7 +43,7 @@
 			<Tool
 				Name="VCCLCompilerTool"
 				AdditionalIncludeDirectories="..\..\Modules\expat"
-				PreprocessorDefinitions="XML_NS;XML_DTD;BYTEORDER=1234;XML_CONTEXT_BYTES=1024;USE_PYEXPAT_CAPI;XML_STATIC;HAVE_MEMMOVE"
+				PreprocessorDefinitions="USE_PYEXPAT_CAPI;XML_STATIC"
 			/>
 			<Tool
 				Name="VCManagedResourceCompilerTool"
@@ -105,7 +105,7 @@
 			<Tool
 				Name="VCCLCompilerTool"
 				AdditionalIncludeDirectories="..\..\Modules\expat"
-				PreprocessorDefinitions="XML_NS;XML_DTD;BYTEORDER=1234;XML_CONTEXT_BYTES=1024;USE_PYEXPAT_CAPI;XML_STATIC;HAVE_MEMMOVE"
+				PreprocessorDefinitions="USE_PYEXPAT_CAPI;XML_STATIC"
 			/>
 			<Tool
 				Name="VCManagedResourceCompilerTool"
@@ -167,7 +167,7 @@
 			<Tool
 				Name="VCCLCompilerTool"
 				AdditionalIncludeDirectories="..\..\Modules\expat"
-				PreprocessorDefinitions="XML_NS;XML_DTD;BYTEORDER=1234;XML_CONTEXT_BYTES=1024;USE_PYEXPAT_CAPI;XML_STATIC;HAVE_MEMMOVE"
+				PreprocessorDefinitions="USE_PYEXPAT_CAPI;XML_STATIC"
 			/>
 			<Tool
 				Name="VCManagedResourceCompilerTool"
@@ -230,7 +230,7 @@
 			<Tool
 				Name="VCCLCompilerTool"
 				AdditionalIncludeDirectories="..\..\Modules\expat"
-				PreprocessorDefinitions="XML_NS;XML_DTD;BYTEORDER=1234;XML_CONTEXT_BYTES=1024;USE_PYEXPAT_CAPI;XML_STATIC;HAVE_MEMMOVE"
+				PreprocessorDefinitions="USE_PYEXPAT_CAPI;XML_STATIC"
 			/>
 			<Tool
 				Name="VCManagedResourceCompilerTool"
@@ -292,7 +292,7 @@
 			<Tool
 				Name="VCCLCompilerTool"
 				AdditionalIncludeDirectories="..\..\Modules\expat"
-				PreprocessorDefinitions="XML_NS;XML_DTD;BYTEORDER=1234;XML_CONTEXT_BYTES=1024;USE_PYEXPAT_CAPI;XML_STATIC;HAVE_MEMMOVE"
+				PreprocessorDefinitions="USE_PYEXPAT_CAPI;XML_STATIC"
 			/>
 			<Tool
 				Name="VCManagedResourceCompilerTool"
@@ -355,7 +355,7 @@
 			<Tool
 				Name="VCCLCompilerTool"
 				AdditionalIncludeDirectories="..\..\Modules\expat"
-				PreprocessorDefinitions="XML_NS;XML_DTD;BYTEORDER=1234;XML_CONTEXT_BYTES=1024;USE_PYEXPAT_CAPI;XML_STATIC;HAVE_MEMMOVE"
+				PreprocessorDefinitions="USE_PYEXPAT_CAPI;XML_STATIC"
 			/>
 			<Tool
 				Name="VCManagedResourceCompilerTool"
@@ -418,7 +418,7 @@
 			<Tool
 				Name="VCCLCompilerTool"
 				AdditionalIncludeDirectories="..\..\Modules\expat"
-				PreprocessorDefinitions="XML_NS;XML_DTD;BYTEORDER=1234;XML_CONTEXT_BYTES=1024;USE_PYEXPAT_CAPI;XML_STATIC;HAVE_MEMMOVE"
+				PreprocessorDefinitions="USE_PYEXPAT_CAPI;XML_STATIC"
 			/>
 			<Tool
 				Name="VCManagedResourceCompilerTool"
@@ -481,7 +481,7 @@
 			<Tool
 				Name="VCCLCompilerTool"
 				AdditionalIncludeDirectories="..\..\Modules\expat"
-				PreprocessorDefinitions="XML_NS;XML_DTD;BYTEORDER=1234;XML_CONTEXT_BYTES=1024;USE_PYEXPAT_CAPI;XML_STATIC;HAVE_MEMMOVE"
+				PreprocessorDefinitions="USE_PYEXPAT_CAPI;XML_STATIC"
 			/>
 			<Tool
 				Name="VCManagedResourceCompilerTool"
diff --git a/PC/VS9.0/pyexpat.vcproj b/PC/VS9.0/pyexpat.vcproj
index 7b09076cddffb4..32ec10dd7a8ec2 100644
--- a/PC/VS9.0/pyexpat.vcproj
+++ b/PC/VS9.0/pyexpat.vcproj
@@ -43,7 +43,7 @@
 			<Tool
 				Name="VCCLCompilerTool"
 				AdditionalIncludeDirectories=".\..\..\Modules\expat"
-				PreprocessorDefinitions="PYEXPAT_EXPORTS;HAVE_EXPAT_H;XML_NS;XML_DTD;BYTEORDER=1234;XML_CONTEXT_BYTES=1024;XML_STATIC;HAVE_MEMMOVE"
+				PreprocessorDefinitions="PYEXPAT_EXPORTS;XML_STATIC"
 			/>
 			<Tool
 				Name="VCManagedResourceCompilerTool"
@@ -104,7 +104,7 @@
 			<Tool
 				Name="VCCLCompilerTool"
 				AdditionalIncludeDirectories=".\..\..\Modules\expat"
-				PreprocessorDefinitions="PYEXPAT_EXPORTS;HAVE_EXPAT_H;XML_NS;XML_DTD;BYTEORDER=1234;XML_CONTEXT_BYTES=1024;XML_STATIC;HAVE_MEMMOVE"
+				PreprocessorDefinitions="PYEXPAT_EXPORTS;XML_STATIC"
 			/>
 			<Tool
 				Name="VCManagedResourceCompilerTool"
@@ -165,7 +165,7 @@
 			<Tool
 				Name="VCCLCompilerTool"
 				AdditionalIncludeDirectories=".\..\..\Modules\expat"
-				PreprocessorDefinitions="PYEXPAT_EXPORTS;HAVE_EXPAT_H;XML_NS;XML_DTD;BYTEORDER=1234;XML_CONTEXT_BYTES=1024;XML_STATIC;HAVE_MEMMOVE"
+				PreprocessorDefinitions="PYEXPAT_EXPORTS;XML_STATIC"
 			/>
 			<Tool
 				Name="VCManagedResourceCompilerTool"
@@ -227,7 +227,7 @@
 			<Tool
 				Name="VCCLCompilerTool"
 				AdditionalIncludeDirectories=".\..\..\Modules\expat"
-				PreprocessorDefinitions="PYEXPAT_EXPORTS;HAVE_EXPAT_H;XML_NS;XML_DTD;BYTEORDER=1234;XML_CONTEXT_BYTES=1024;XML_STATIC;HAVE_MEMMOVE"
+				PreprocessorDefinitions="PYEXPAT_EXPORTS;XML_STATIC"
 			/>
 			<Tool
 				Name="VCManagedResourceCompilerTool"
@@ -288,7 +288,7 @@
 			<Tool
 				Name="VCCLCompilerTool"
 				AdditionalIncludeDirectories=".\..\..\Modules\expat"
-				PreprocessorDefinitions="PYEXPAT_EXPORTS;HAVE_EXPAT_H;XML_NS;XML_DTD;BYTEORDER=1234;XML_CONTEXT_BYTES=1024;XML_STATIC;HAVE_MEMMOVE"
+				PreprocessorDefinitions="PYEXPAT_EXPORTS;XML_STATIC"
 			/>
 			<Tool
 				Name="VCManagedResourceCompilerTool"
@@ -350,7 +350,7 @@
 			<Tool
 				Name="VCCLCompilerTool"
 				AdditionalIncludeDirectories=".\..\..\Modules\expat"
-				PreprocessorDefinitions="PYEXPAT_EXPORTS;HAVE_EXPAT_H;XML_NS;XML_DTD;BYTEORDER=1234;XML_CONTEXT_BYTES=1024;XML_STATIC;HAVE_MEMMOVE"
+				PreprocessorDefinitions="PYEXPAT_EXPORTS;XML_STATIC"
 			/>
 			<Tool
 				Name="VCManagedResourceCompilerTool"
@@ -412,7 +412,7 @@
 			<Tool
 				Name="VCCLCompilerTool"
 				AdditionalIncludeDirectories=".\..\..\Modules\expat"
-				PreprocessorDefinitions="PYEXPAT_EXPORTS;HAVE_EXPAT_H;XML_NS;XML_DTD;BYTEORDER=1234;XML_CONTEXT_BYTES=1024;XML_STATIC;HAVE_MEMMOVE"
+				PreprocessorDefinitions="PYEXPAT_EXPORTS;XML_STATIC"
 			/>
 			<Tool
 				Name="VCManagedResourceCompilerTool"
@@ -474,7 +474,7 @@
 			<Tool
 				Name="VCCLCompilerTool"
 				AdditionalIncludeDirectories=".\..\..\Modules\expat"
-				PreprocessorDefinitions="PYEXPAT_EXPORTS;HAVE_EXPAT_H;XML_NS;XML_DTD;BYTEORDER=1234;XML_CONTEXT_BYTES=1024;XML_STATIC;HAVE_MEMMOVE"
+				PreprocessorDefinitions="PYEXPAT_EXPORTS;XML_STATIC"
 			/>
 			<Tool
 				Name="VCManagedResourceCompilerTool"
diff --git a/PC/VS9.0/pyproject.vsprops b/PC/VS9.0/pyproject.vsprops
index c97396018d2efd..44b4f5317ed176 100644
--- a/PC/VS9.0/pyproject.vsprops
+++ b/PC/VS9.0/pyproject.vsprops
@@ -12,7 +12,7 @@
 		InlineFunctionExpansion="1"
 		EnableIntrinsicFunctions="true"
 		AdditionalIncludeDirectories="..\..\Include; ..\..\PC"
-		PreprocessorDefinitions="_WIN32"
+		PreprocessorDefinitions="_WIN32;WIN32"
 		StringPooling="true"
 		ExceptionHandling="0"
 		RuntimeLibrary="0"
diff --git a/PCbuild/_elementtree.vcxproj b/PCbuild/_elementtree.vcxproj
index 1ce1a0450eb4e3..3a271ef593121e 100644
--- a/PCbuild/_elementtree.vcxproj
+++ b/PCbuild/_elementtree.vcxproj
@@ -62,7 +62,7 @@
   <ItemDefinitionGroup>
     <ClCompile>
       <AdditionalIncludeDirectories>..\Modules\expat;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>XML_NS;XML_DTD;BYTEORDER=1234;XML_CONTEXT_BYTES=1024;USE_PYEXPAT_CAPI;XML_STATIC;HAVE_MEMMOVE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>USE_PYEXPAT_CAPI;XML_STATIC;%(PreprocessorDefinitions)</PreprocessorDefinitions>
     </ClCompile>
     <Link>
       <BaseAddress>0x1D100000</BaseAddress>
diff --git a/PCbuild/pyexpat.vcxproj b/PCbuild/pyexpat.vcxproj
index a319ff9803a52a..6d036d13dab908 100644
--- a/PCbuild/pyexpat.vcxproj
+++ b/PCbuild/pyexpat.vcxproj
@@ -59,7 +59,7 @@
   <ItemDefinitionGroup>
     <ClCompile>
       <AdditionalIncludeDirectories>$(PySourcePath)Modules\expat;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>PYEXPAT_EXPORTS;HAVE_EXPAT_H;XML_NS;XML_DTD;BYTEORDER=1234;XML_CONTEXT_BYTES=1024;XML_STATIC;HAVE_MEMMOVE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>PYEXPAT_EXPORTS;XML_STATIC;%(PreprocessorDefinitions)</PreprocessorDefinitions>
     </ClCompile>
   </ItemDefinitionGroup>
   <ItemGroup>