diff --git a/test/cpp/Makefile.am b/test/cpp/Makefile.am
index 5e96596..3dbcaaa 100755
--- a/test/cpp/Makefile.am
+++ b/test/cpp/Makefile.am
@@ -96,10 +96,7 @@
 gen-cpp/StressTest_types.cpp gen-cpp/StressTest_constants.cpp: $(top_srcdir)/test/StressTest.thrift
 	$(THRIFT) --gen cpp $<
 
-INCLUDES = \
-	-I$(top_srcdir)/lib/cpp/src -Igen-cpp
-
-AM_CPPFLAGS = $(BOOST_CPPFLAGS) $(LIBEVENT_CPPFLAGS)
+AM_CPPFLAGS = $(BOOST_CPPFLAGS) $(LIBEVENT_CPPFLAGS) -I$(top_srcdir)/lib/cpp/src -Igen-cpp
 AM_CXXFLAGS = -Wall
 AM_LDFLAGS = $(BOOST_LDFLAGS) $(LIBEVENT_LDFLAGS)