diff --git a/test/Makefile.am b/test/Makefile.am
index b1092d5..1a2884e 100644
--- a/test/Makefile.am
+++ b/test/Makefile.am
@@ -20,6 +20,9 @@
 	ThriftTest_extras.cpp \
 	DebugProtoTest_extras.cpp
 
+ThriftTest_extras.o: gen-cpp/ThriftTest_types.h
+DebugProtoTest_extras.o: gen-cpp/DebugProtoTest_types.h
+
 libtestgencpp_la_LIBADD = $(top_builddir)/lib/cpp/libthrift.la
 
 noinst_PROGRAMS = Benchmark