diff --git a/test/default/Makefile.am b/test/default/Makefile.am
index 630fe372..0e8f9516 100644
--- a/test/default/Makefile.am
+++ b/test/default/Makefile.am
@@ -38,6 +38,8 @@ EXTRA_DIST = \
 AM_CPPFLAGS = \
 	-I$(top_srcdir)/src/libsodium/include \
 	-I$(top_srcdir)/src/libsodium/include/sodium \
+	-I$(top_builddir)/src/libsodium/include \
+	-I$(top_builddir)/src/libsodium/include/sodium \
 	-I$(top_srcdir)/test/quirks
 
 TESTS_TARGETS = \