diff --git a/lib/csharp/Makefile.am b/lib/csharp/Makefile.am
index 8395266..bb850fa 100644
--- a/lib/csharp/Makefile.am
+++ b/lib/csharp/Makefile.am
@@ -15,6 +15,7 @@
             src/Server/TThreadPoolServer.cs \
             src/Server/TSimpleServer.cs \
             src/Server/TServer.cs \
+            src/Transport/TBufferedTransport.cs \
             src/Transport/TTransport.cs \
             src/Transport/TSocket.cs \
             src/Transport/TTransportException.cs \