diff --git a/lib/libauditd/Makefile b/lib/libauditd/Makefile
index cee1850ac9c2..10039e9914ec 100644
--- a/lib/libauditd/Makefile
+++ b/lib/libauditd/Makefile
@@ -3,19 +3,19 @@
 #
 
 OPENBSMDIR=		${.CURDIR}/../../contrib/openbsm
-LIBAUDITDDIR=		${OPENBSMDIR}/libauditd
-LIBBSMDIR=		${OPENBSMDIR}/libbsm
+_LIBAUDITDDIR=		${OPENBSMDIR}/libauditd
+_LIBBSMDIR=		${OPENBSMDIR}/libbsm
 
 LIB=		auditd
 
-.PATH:		${LIBAUDITDDIR}
+.PATH:		${_LIBAUDITDDIR}
 
 SRCS=	auditd_lib.c
 
 #
 # Must use BSM include files from within the contrib area, not the system.
 #
-CFLAGS+=	-I${OPENBSMDIR} -I${LIBBSMDIR}
+CFLAGS+=	-I${OPENBSMDIR} -I${_LIBBSMDIR}
 
 WARNS?=		3