diff --git a/pkg/Microsoft.Private.Winforms/Microsoft.Private.Winforms.csproj b/pkg/Microsoft.Private.Winforms/Microsoft.Private.Winforms.csproj
index 552e6503578..afdd6a21a59 100644
--- a/pkg/Microsoft.Private.Winforms/Microsoft.Private.Winforms.csproj
+++ b/pkg/Microsoft.Private.Winforms/Microsoft.Private.Winforms.csproj
@@ -67,6 +67,9 @@
     <!-- Reference and Source System.Windows.Forms includes -->
     <ProjectReference Include="..\..\src\System.Windows.Forms\src\System.Windows.Forms.csproj" />
 
+    <!-- Reference and Source System.Windows.Forms.Primitives includes -->
+    <ProjectReference Include="..\..\src\System.Windows.Forms.Primitives\src\System.Windows.Forms.Primitives.csproj" />
+
     <!-- Reference and Source System.Windows.Forms.Design includes -->
     <ProjectReference Include="..\..\src\System.Windows.Forms.Design\src\System.Windows.Forms.Design.csproj" />