diff --git a/lib/csharp/Makefile.am b/lib/csharp/Makefile.am
index 71cc83b..e847237 100644
--- a/lib/csharp/Makefile.am
+++ b/lib/csharp/Makefile.am
@@ -58,6 +58,8 @@
             src/Transport/THttpClient.cs \
             src/Transport/THttpHandler.cs \
             src/Transport/TMemoryBuffer.cs \
+            src/Transport/TNamedPipeClientTransport.cs \
+            src/Transport/TNamedPipeServerTransport.cs \
             src/TProcessor.cs \
             src/TException.cs \
             src/TApplicationException.cs