diff --git a/configure.ac b/configure.ac
index 6b26de5..1eaa359 100755
--- a/configure.ac
+++ b/configure.ac
@@ -692,6 +692,7 @@
   lib/c_glib/thrift_c_glib.pc
   lib/c_glib/test/Makefile
   lib/csharp/Makefile
+  lib/csharp/test/ThriftTest/Makefile
   lib/d/Makefile
   lib/d/test/Makefile
   lib/erl/Makefile