diff --git a/Directory.Build.props b/Directory.Build.props
index 5c5379f9..1017f0dc 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -26,7 +26,6 @@
     <Nullable>enable</Nullable>
   </PropertyGroup>
   <PropertyGroup Label="Condition Variables" >
-    <IsNetCore>$(NetCoreVersions.Contains('$(TargetFramework)'))</IsNetCore>
     <IsNetStandard>$(NetStandardVersions.Contains('$(TargetFramework)'))</IsNetStandard>
   </PropertyGroup>
   <PropertyGroup Label="Signing" >
diff --git a/src/Abstractions/Microsoft.Omex.Extensions.Abstractions.csproj b/src/Abstractions/Microsoft.Omex.Extensions.Abstractions.csproj
index ec9b9340..fbf0876d 100644
--- a/src/Abstractions/Microsoft.Omex.Extensions.Abstractions.csproj
+++ b/src/Abstractions/Microsoft.Omex.Extensions.Abstractions.csproj
@@ -18,7 +18,7 @@
     <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" />
     <PackageReference Include="System.Diagnostics.DiagnosticSource" />
   </ItemGroup>
-  <ItemGroup Condition="!$(IsNetCore)">
+  <ItemGroup Condition="$(IsNetStandard)">
     <PackageReference Include="System.Threading.Tasks.Extensions" />
   </ItemGroup>
 </Project>