diff --git a/dir.targets b/dir.targets
index 902a6c17dda3..7ad0a7881bca 100644
--- a/dir.targets
+++ b/dir.targets
@@ -60,8 +60,8 @@
       <PackageFileRefPath Condition="'$(IsNETCoreAppRef)' == 'true'">$(NETCoreAppPackageRefPath)</PackageFileRefPath>
       <PackageFileRuntimePath>$(NETCoreAppPackageRuntimePath)</PackageFileRuntimePath>
       <RuntimePath Condition="'$(BinPlaceNETCoreAppPackage)' == 'true'">$(NETCoreAppPackageRuntimePath)\..\runtime</RuntimePath>
-      <!-- enable trimming for any project that's part of the shared framework -->
-      <SetProperties Condition="'$(IsRuntimeAssembly)' == 'true'">ILLinkTrimAssembly=true</SetProperties>
+      <!-- enable trimming for any runtime project that's part of the shared framework and hasn't already set ILLinkTrimAssembly -->
+      <SetProperties Condition="'$(BinPlaceRuntime)' == 'true' AND '$(ILLinkTrimAssembly)' == ''">ILLinkTrimAssembly=true</SetProperties>
     </BinPlaceConfiguration>
     <BinPlaceConfiguration Condition="'$(IsUAP)' == 'true' AND '$(BuildingUAPVertical)' == 'true'" Include="uap-$(_bc_OSGroup)">
       <PackageFileRefPath Condition="'$(IsUAPRef)'=='true'">$(UAPPackageRefPath)</PackageFileRefPath>