diff --git a/lib/csharp/Makefile.am b/lib/csharp/Makefile.am
index 1c75aa1..5ce4276 100644
--- a/lib/csharp/Makefile.am
+++ b/lib/csharp/Makefile.am
@@ -17,6 +17,8 @@
 # under the License.
 #
 
+SUBDIRS = . test/ThriftTest
+
 THRIFTCODE= \
             src/Collections/THashSet.cs \
             src/Collections/TCollections.cs \
@@ -81,6 +83,9 @@
 clean-local:
 	$(RM) Thrift.dll
 
+precross:
+	$(MAKE) -C test/ThriftTest precross
+
 # run csharp tests?
 # check:
 # 	cd test/ThriftTest && ./maketest.sh