diff --git a/src/Authoring/Directory.Build.props b/src/Authoring/Directory.Build.props
index 1b421ed0d..6742673c7 100644
--- a/src/Authoring/Directory.Build.props
+++ b/src/Authoring/Directory.Build.props
@@ -2,4 +2,8 @@
 
   <Import Project="$([MSBuild]::GetPathOfFileAbove('Directory.Build.props', '$(MSBuildThisFileDirectory)../'))" />
 
+  <PropertyGroup>
+    <DisableRuntimeMarshalling>True</DisableRuntimeMarshalling>
+  </PropertyGroup>
+
 </Project>
diff --git a/src/Directory.Build.props b/src/Directory.Build.props
index 44453be6f..dbd795878 100644
--- a/src/Directory.Build.props
+++ b/src/Directory.Build.props
@@ -31,7 +31,6 @@
     <TestsBuildTFMs>net6.0-windows10.0.19041.0;net7.0-windows10.0.19041.0</TestsBuildTFMs>
     <TestsBuildTFMs Condition="'$(CIBuildReason)' == 'CI'">net6.0-windows10.0.19041.0;net7.0-windows10.0.19041.0</TestsBuildTFMs>
     <WindowsAppSDKVerifyWinrtRuntimeVersion>false</WindowsAppSDKVerifyWinrtRuntimeVersion>
-    <DisableRuntimeMarshalling>True</DisableRuntimeMarshalling>
   </PropertyGroup>
 
   <PropertyGroup Condition="!$(IsTargetFrameworkNet5OrGreater)">
diff --git a/src/Projections/Directory.Build.props b/src/Projections/Directory.Build.props
index 4305d901a..1b7abb6b3 100644
--- a/src/Projections/Directory.Build.props
+++ b/src/Projections/Directory.Build.props
@@ -2,6 +2,9 @@
 
   <PropertyGroup>
     <SimulateCsWinRTNugetReference>true</SimulateCsWinRTNugetReference>
+
+    <!-- Projections should not require runtime marshalling. -->
+    <DisableRuntimeMarshalling>True</DisableRuntimeMarshalling>
   </PropertyGroup>
 
   <Import Project="$([MSBuild]::GetPathOfFileAbove('Directory.Build.props', '$(MSBuildThisFileDirectory)../'))" />
diff --git a/src/WinRT.Runtime/Directory.Build.props b/src/WinRT.Runtime/Directory.Build.props
index 26add7b49..1893bc8d3 100644
--- a/src/WinRT.Runtime/Directory.Build.props
+++ b/src/WinRT.Runtime/Directory.Build.props
@@ -3,4 +3,9 @@
 
   <Import Project="$([MSBuild]::GetPathOfFileAbove('Directory.Build.props', '$(MSBuildThisFileDirectory)../'))" />
 
+  <PropertyGroup>
+    <!-- Projections should not require runtime marshalling. -->
+    <DisableRuntimeMarshalling>True</DisableRuntimeMarshalling>
+  </PropertyGroup>
+
 </Project>