diff --git a/src/Package/build/ReferenceTrimmer.props b/src/Package/build/ReferenceTrimmer.props
index ab9363b..3fc541e 100644
--- a/src/Package/build/ReferenceTrimmer.props
+++ b/src/Package/build/ReferenceTrimmer.props
@@ -1,9 +1,5 @@
 <Project>
 
-  <PropertyGroup>
-    <ReferenceTrimmerTasksAssembly Condition=" '$(ReferenceTrimmerTasksAssembly)' == '' ">$(MSBuildThisFileDirectory)ReferenceTrimmer.Tasks.dll</ReferenceTrimmerTasksAssembly>
-  </PropertyGroup>
-
   <ItemDefinitionGroup Condition=" '$(EnableReferenceTrimmer)' != 'false' and '$(ReferenceTrimmerEnableVcxproj)' != 'false' ">
     <Link>
         <!-- Enable link.exe traceouts of unused libraries and delay-load DLLs from vcxproj projects.
diff --git a/src/Package/build/ReferenceTrimmer.targets b/src/Package/build/ReferenceTrimmer.targets
index 10c8df4..dc0bd40 100644
--- a/src/Package/build/ReferenceTrimmer.targets
+++ b/src/Package/build/ReferenceTrimmer.targets
@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project>
-  <UsingTask TaskName="CollectDeclaredReferencesTask" AssemblyFile="$(ReferenceTrimmerTasksAssembly)" />
+  <UsingTask TaskName="CollectDeclaredReferencesTask" AssemblyFile="$(ReferenceTrimmerTasksAssembly)" Condition=" '$(ReferenceTrimmerTasksAssembly)' != '' " />
+  <UsingTask TaskName="CollectDeclaredReferencesTask" AssemblyFile="$(MSBuildThisFileDirectory)ReferenceTrimmer.Tasks.dll" Condition=" '$(ReferenceTrimmerTasksAssembly)' == '' " />
 
   <PropertyGroup>
     <CoreCompileDependsOn Condition="'$(EnableReferenceTrimmer)' != 'false'">$(CoreCompileDependsOn);CollectDeclaredReferences</CoreCompileDependsOn>
@@ -51,4 +52,4 @@
       <FileWrites Include="$(_ReferenceTrimmerUnusedReferencesFile)" Condition="'$(EnableReferenceTrimmerDiagnostics)'=='true'" />
     </ItemGroup>
   </Target>
-</Project>
\ No newline at end of file
+</Project>