diff --git a/lib/csharp/Makefile.am b/lib/csharp/Makefile.am
index 039db74..d8a007b 100644
--- a/lib/csharp/Makefile.am
+++ b/lib/csharp/Makefile.am
@@ -46,6 +46,7 @@
             src/Transport/TServerTransport.cs \
             src/Transport/TServerSocket.cs \
             src/Transport/TTransportFactory.cs \
+            src/Transport/THttpClient.cs \
             src/TProcessor.cs \
             src/TApplicationException.cs