diff --git a/build/ApiDiff.props b/build/ApiDiff.props
index da82fbcc51..3d322f56d5 100644
--- a/build/ApiDiff.props
+++ b/build/ApiDiff.props
@@ -7,6 +7,6 @@
     <ItemGroup>
       <PackageDownload Include="$(NugetPackageName)" Version="[$(ApiContractPackageVersion)]" />
       <PackageReference Include="Microsoft.DotNet.ApiCompat" Version="5.0.0-beta.20372.2" PrivateAssets="All" />
-    <ResolvedMatchingContract Include="$(NuGetPackageRoot)\$(NugetPackageName.ToLower())\$(ApiContractPackageVersion)\lib\$(TargetFramework)\$(AssemblyName).dll" />
+      <ResolvedMatchingContract Include="$(NuGetPackageRoot)\$(NugetPackageName.ToLowerInvariant())\$(ApiContractPackageVersion)\lib\$(TargetFramework)\$(AssemblyName).dll" />
     </ItemGroup>
 </Project>