diff --git a/src/NuGet/Microsoft.Net.Compilers.Toolset/Framework/build/Microsoft.Net.Compilers.Toolset.Framework.Core.props b/src/NuGet/Microsoft.Net.Compilers.Toolset/Framework/build/Microsoft.Net.Compilers.Toolset.Framework.Core.props
index 90ad67b5feb6d..192ae2959ec21 100644
--- a/src/NuGet/Microsoft.Net.Compilers.Toolset/Framework/build/Microsoft.Net.Compilers.Toolset.Framework.Core.props
+++ b/src/NuGet/Microsoft.Net.Compilers.Toolset/Framework/build/Microsoft.Net.Compilers.Toolset.Framework.Core.props
@@ -4,6 +4,7 @@
   <PropertyGroup>
     <_RoslynTargetDirectoryName>net472</_RoslynTargetDirectoryName>   
     <_RoslynTasksDirectory>$(MSBuildThisFileDirectory)..\tasks\$(_RoslynTargetDirectoryName)\</_RoslynTasksDirectory>
+    <RoslynCompilerType>Custom</RoslynCompilerType>
     <RoslynTasksAssembly>$(_RoslynTasksDirectory)Microsoft.Build.Tasks.CodeAnalysis.dll</RoslynTasksAssembly> 
     <UseSharedCompilation Condition="'$(UseSharedCompilation)' == ''">true</UseSharedCompilation>
     <CSharpCoreTargetsPath>$(_RoslynTasksDirectory)Microsoft.CSharp.Core.targets</CSharpCoreTargetsPath>
diff --git a/src/NuGet/Microsoft.Net.Compilers.Toolset/arm64/build/Microsoft.Net.Compilers.Toolset.Arm64.props b/src/NuGet/Microsoft.Net.Compilers.Toolset/arm64/build/Microsoft.Net.Compilers.Toolset.Arm64.props
index ea3dd999eb8c4..499e9baaebbae 100644
--- a/src/NuGet/Microsoft.Net.Compilers.Toolset/arm64/build/Microsoft.Net.Compilers.Toolset.Arm64.props
+++ b/src/NuGet/Microsoft.Net.Compilers.Toolset/arm64/build/Microsoft.Net.Compilers.Toolset.Arm64.props
@@ -3,6 +3,7 @@
 
   <PropertyGroup>
     <_RoslynTasksDirectory>$(MSBuildThisFileDirectory)..\tasks\net472\</_RoslynTasksDirectory>
+    <RoslynCompilerType>Custom</RoslynCompilerType>
     <RoslynTasksAssembly>$(_RoslynTasksDirectory)Microsoft.Build.Tasks.CodeAnalysis.dll</RoslynTasksAssembly> 
     <UseSharedCompilation Condition="'$(UseSharedCompilation)' == ''">true</UseSharedCompilation>
     <CSharpCoreTargetsPath>$(_RoslynTasksDirectory)Microsoft.CSharp.Core.targets</CSharpCoreTargetsPath>