diff --git a/tests/mgcp_client/Makefile.am b/tests/mgcp_client/Makefile.am
index e33f0e8..5cd0d8a 100644
--- a/tests/mgcp_client/Makefile.am
+++ b/tests/mgcp_client/Makefile.am
@@ -1,6 +1,7 @@
 AM_CPPFLAGS = \
 	$(all_includes) \
 	-I$(top_srcdir)/include \
+	-I$(top_builddir)/include \
 	-I$(top_srcdir) \
 	$(NULL)