diff --git a/build/vsx/libxml2/libxml2/libxml2.vcxproj b/build/vsx/libxml2/libxml2/libxml2.vcxproj
index f4d2bef17..15fd066c1 100644
--- a/build/vsx/libxml2/libxml2/libxml2.vcxproj
+++ b/build/vsx/libxml2/libxml2/libxml2.vcxproj
@@ -67,13 +67,14 @@
     <ClCompile>
       <WarningLevel>Level4</WarningLevel>
       <AdditionalIncludeDirectories>$(SolutionDir)$(Platform)\$(Configuration)\include;$(ProjectDir)..\..\..\..\..\libxml2\include;$(ProjectDir)..\..\..\..\..\libxml2\win32\VC10;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>_WIN32;_WINDLL;_USRDLL;_CRT_SECURE_NO_WARNINGS;HAVE_WIN32_THREADS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>_WIN32;_WINDLL;_USRDLL;_CRT_SECURE_NO_WARNINGS;HAVE_WIN32_THREADS;HAVE_COMPILER_TLS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <UndefinePreprocessorDefinitions>LIBXML_MODULES_ENABLED</UndefinePreprocessorDefinitions>
       <MinimalRebuild>false</MinimalRebuild>
       <BasicRuntimeChecks>Default</BasicRuntimeChecks>
       <PrecompiledHeader>NotUsing</PrecompiledHeader>
       <CompileAsWinRT>false</CompileAsWinRT>
       <AdditionalUsingDirectories>$(WindowsSDK_MetadataPath);$(AdditionalUsingDirectories)</AdditionalUsingDirectories>
+      <ForcedIncludeFiles>$(ProjectDir)libxml2_port.h</ForcedIncludeFiles>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -95,7 +96,7 @@
       <WarningLevel>Level4</WarningLevel>
       <Optimization>MaxSpeed</Optimization>
       <AdditionalIncludeDirectories>$(SolutionDir)$(Platform)\$(Configuration)\include;$(ProjectDir)..\..\..\..\..\libxml2\include;$(ProjectDir)..\..\..\..\..\libxml2\win32\VC10;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>_WIN32;_WINDLL;_USRDLL;NDEBUG;_CRT_SECURE_NO_WARNINGS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>_WIN32;_WINDLL;_USRDLL;NDEBUG;_CRT_SECURE_NO_WARNINGS;HAVE_WIN32_THREADS;HAVE_COMPILER_TLS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <UndefinePreprocessorDefinitions>LIBXML_MODULES_ENABLED</UndefinePreprocessorDefinitions>
       <StringPooling>true</StringPooling>
       <FunctionLevelLinking>true</FunctionLevelLinking>
@@ -104,6 +105,7 @@
       <PrecompiledHeader>NotUsing</PrecompiledHeader>
       <CompileAsWinRT>false</CompileAsWinRT>
       <AdditionalUsingDirectories>$(WindowsSDK_MetadataPath);$(AdditionalUsingDirectories)</AdditionalUsingDirectories>
+      <ForcedIncludeFiles>$(ProjectDir)libxml2_port.h</ForcedIncludeFiles>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -153,7 +155,7 @@
       <WarningLevel>Level4</WarningLevel>
       <Optimization>MaxSpeed</Optimization>
       <AdditionalIncludeDirectories>$(SolutionDir)$(Platform)\$(Configuration)\include;$(ProjectDir)..\..\..\..\..\libxml2\include;$(ProjectDir)..\..\..\..\..\libxml2\win32\VC10;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>_WIN32;_WINDLL;_USRDLL;NDEBUG;_CRT_SECURE_NO_WARNINGS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>_WIN32;_WINDLL;_USRDLL;NDEBUG;_CRT_SECURE_NO_WARNINGS;HAVE_WIN32_THREADS;HAVE_COMPILER_TLS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <UndefinePreprocessorDefinitions>LIBXML_MODULES_ENABLED</UndefinePreprocessorDefinitions>
       <StringPooling>true</StringPooling>
       <FunctionLevelLinking>true</FunctionLevelLinking>
@@ -162,6 +164,7 @@
       <PrecompiledHeader>NotUsing</PrecompiledHeader>
       <CompileAsWinRT>false</CompileAsWinRT>
       <AdditionalUsingDirectories>$(WindowsSDK_MetadataPath);$(AdditionalUsingDirectories)</AdditionalUsingDirectories>
+      <ForcedIncludeFiles>$(ProjectDir)libxml2_port.h</ForcedIncludeFiles>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>