diff --git a/tools/tools/ath/Makefile.inc b/tools/tools/ath/Makefile.inc
index 901844ea7f72..85953f2bdd0d 100644
--- a/tools/tools/ath/Makefile.inc
+++ b/tools/tools/ath/Makefile.inc
@@ -11,4 +11,5 @@ CFLAGS+=-I${.CURDIR}/../common
 CFLAGS+=-I${.CURDIR}/../../../../sys
 CFLAGS+=-I${.CURDIR}/../../../../sys/dev/ath
 CFLAGS+=-I${.CURDIR}/../../../../sys/dev/ath/ath_hal
+CFLAGS+=-I${.CURDIR}/../../../../sys/contrib/dev/ath/ath_hal
 CFLAGS+=-I${.OBJDIR}