diff --git a/src/rdisc/tests/Makefile.am b/src/rdisc/tests/Makefile.am
index 85036f71b8..cf351d619a 100644
--- a/src/rdisc/tests/Makefile.am
+++ b/src/rdisc/tests/Makefile.am
@@ -1,6 +1,7 @@
 AM_CPPFLAGS = \
 	-I${top_srcdir} \
 	-I$(top_srcdir)/include \
+	-I$(top_builddir)/include \
 	-I${top_srcdir}/src \
 	-I${top_srcdir}/src/devices \
 	-I${top_srcdir}/src/logging \