diff --git a/test/Makefile.am b/test/Makefile.am
index 5d31f5a..3fa1855 100644
--- a/test/Makefile.am
+++ b/test/Makefile.am
@@ -2,6 +2,7 @@
 	$(GLOBAL_CFLAGS) \
 	-I$(top_srcdir)/include \
 	-I$(top_srcdir)/libcnary/include
+AM_CPPFLAGS = $(AM_CFLAGS)
 
 AM_LDFLAGS =