diff --git a/Misc/NEWS.d/next/Build/2021-02-10-14-11-53.bpo-43174.F9zwXQ.rst b/Misc/NEWS.d/next/Build/2021-02-10-14-11-53.bpo-43174.F9zwXQ.rst
new file mode 100644
index 00000000000..64c80188d02
--- /dev/null
+++ b/Misc/NEWS.d/next/Build/2021-02-10-14-11-53.bpo-43174.F9zwXQ.rst
@@ -0,0 +1 @@
+Windows build now uses ``/utf-8`` compiler option.
diff --git a/PCbuild/pyproject.props b/PCbuild/pyproject.props
index d7762ca1bc6..98e5ab03032 100644
--- a/PCbuild/pyproject.props
+++ b/PCbuild/pyproject.props
@@ -46,6 +46,7 @@
       <WholeProgramOptimization>true</WholeProgramOptimization>
       <InlineFunctionExpansion Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">OnlyExplicitInline</InlineFunctionExpansion>
       <InlineFunctionExpansion Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">OnlyExplicitInline</InlineFunctionExpansion>
+      <AdditionalOptions>/utf-8 %(AdditionalOptions)</AdditionalOptions>
     </ClCompile>
     <ClCompile Condition="$(Configuration) == 'Debug'">
       <Optimization>Disabled</Optimization>