diff --git a/PCbuild/_elementtree.vcxproj b/PCbuild/_elementtree.vcxproj
index 725b5a967bebc9..639ba479db5786 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>_CRT_SECURE_NO_WARNINGS;USE_PYEXPAT_CAPI;XML_STATIC;%(PreprocessorDefinitions)</PreprocessorDefinitions>
     </ClCompile>
     <Link>
       <BaseAddress>0x1D100000</BaseAddress>
@@ -103,4 +103,4 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>
-</Project>
\ No newline at end of file
+</Project>