diff --git a/pkg/Microsoft.Private.CoreFx.NETCoreApp/Microsoft.Private.CoreFx.NETCoreApp.pkgproj b/pkg/Microsoft.Private.CoreFx.NETCoreApp/Microsoft.Private.CoreFx.NETCoreApp.pkgproj
index 61704605e758..dcab73ccccd7 100644
--- a/pkg/Microsoft.Private.CoreFx.NETCoreApp/Microsoft.Private.CoreFx.NETCoreApp.pkgproj
+++ b/pkg/Microsoft.Private.CoreFx.NETCoreApp/Microsoft.Private.CoreFx.NETCoreApp.pkgproj
@@ -27,6 +27,7 @@
 
   <PropertyGroup>
     <IsLineupPackage Condition="'$(PackageTargetRuntime)' == ''">true</IsLineupPackage>
+    <PreventImplementationReference Condition="'$(PackageTargetRuntime)' != ''">true</PreventImplementationReference>     
     <TargetFrameworkName>netcoreapp</TargetFrameworkName>
     <TargetFrameworkVersion>2.0</TargetFrameworkVersion>
     <TargetFramework>$(TargetFrameworkName)$(TargetFrameworkVersion)</TargetFramework>