diff --git a/tutorial/cpp/Makefile.am b/tutorial/cpp/Makefile.am
index 3b38240..9bc6318 100755
--- a/tutorial/cpp/Makefile.am
+++ b/tutorial/cpp/Makefile.am
@@ -18,6 +18,9 @@
 #
 AUTOMAKE_OPTIONS = subdir-objects serial-tests
 
+BUILT_SOURCES = gen-cpp/shared_types.cpp \
+                gen-cpp/tutorial_types.cpp
+
 noinst_LTLIBRARIES = libtutorialgencpp.la
 nodist_libtutorialgencpp_la_SOURCES = \
 	gen-cpp/Calculator.cpp \