diff --git a/src/Makefile_Eina_Cxx.am b/src/Makefile_Eina_Cxx.am
index fa4888da41..ffd9111aa2 100644
--- a/src/Makefile_Eina_Cxx.am
+++ b/src/Makefile_Eina_Cxx.am
@@ -47,6 +47,7 @@ tests/eina_cxx/eina_cxx_test_eina_value.cc
 
 tests_eina_cxx_eina_cxx_suite_CXXFLAGS = -I$(top_builddir)/src/lib/efl \
 -I$(top_builddir)/src/lib/eina_cxx \
+-I$(top_srcdir)/src/lib/eina_cxx \
 -DTESTS_WD=\"`pwd`\" \
 -DTESTS_SRC_DIR=\"$(top_srcdir)/src/tests/eina_cxx\" \
 -DPACKAGE_BUILD_DIR=\"`pwd`/$(top_builddir)/src/tests/eina_cxx\" \