diff --git a/lib/csharp/src/Thrift.csproj b/lib/csharp/src/Thrift.csproj
index b7e2108..7cc1358 100644
--- a/lib/csharp/src/Thrift.csproj
+++ b/lib/csharp/src/Thrift.csproj
@@ -59,6 +59,7 @@
     <Compile Include="TProcessor.cs" />
     <Compile Include="Transport\TBufferedTransport.cs" />
     <Compile Include="Transport\TFramedTransport.cs" />
+    <Compile Include="Transport\THttpClient.cs" />
     <Compile Include="Transport\TServerSocket.cs" />
     <Compile Include="Transport\TServerTransport.cs" />
     <Compile Include="Transport\TSocket.cs" />