diff --git a/src/SignalR/clients/csharp/Http.Connections.Client/src/Microsoft.AspNetCore.Http.Connections.Client.csproj b/src/SignalR/clients/csharp/Http.Connections.Client/src/Microsoft.AspNetCore.Http.Connections.Client.csproj
index 7c9977be80e2..4086df48687e 100644
--- a/src/SignalR/clients/csharp/Http.Connections.Client/src/Microsoft.AspNetCore.Http.Connections.Client.csproj
+++ b/src/SignalR/clients/csharp/Http.Connections.Client/src/Microsoft.AspNetCore.Http.Connections.Client.csproj
@@ -25,7 +25,7 @@
     <Reference Include="Microsoft.AspNetCore.Http.Connections.Common" />
     <Reference Include="Microsoft.Extensions.Logging.Abstractions" />
     <Reference Include="Microsoft.Extensions.Options" />
-    <Reference Include="System.Net.ServerSentEvents" />
+    <Reference Include="System.Net.ServerSentEvents" Condition="'$(TargetFramework)' != '$(DefaultNetCoreTargetFramework)'" />
   </ItemGroup>
 
   <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetFxTargetFramework)' OR '$(MSBuildRestoreSessionId)' == ''">