Index: head/cddl/usr.sbin/lockstat/Makefile
===================================================================
--- head/cddl/usr.sbin/lockstat/Makefile	(revision 270316)
+++ head/cddl/usr.sbin/lockstat/Makefile	(revision 270317)
@@ -1,30 +1,31 @@
 # $FreeBSD$
 
 .PATH: ${.CURDIR}/../../../cddl/contrib/opensolaris/cmd/lockstat
 
 PROG=		lockstat
 SRCS=		lockstat.c sym.c
 BINDIR?=	/usr/sbin
 
 WARNS?=		1
 
 CFLAGS+=	-I${.CURDIR}/../../../sys/cddl/compat/opensolaris \
 		-I${.CURDIR}/../../../cddl/compat/opensolaris/include \
 		-I${OPENSOLARIS_USR_DISTDIR}/head \
 		-I${OPENSOLARIS_USR_DISTDIR}/lib/libdtrace/common \
 		-I${OPENSOLARIS_USR_DISTDIR}/lib/libproc/common \
 		-I${OPENSOLARIS_SYS_DISTDIR}/uts/common \
 		-I${OPENSOLARIS_SYS_DISTDIR}/compat \
 		-I${.CURDIR}/../../../sys
 
 CFLAGS+=	-DNEED_ERRLOC -g
+CSTD?=		gnu99
 
 #YFLAGS+=	-d
 
 DPADD=		${LIBPTHREAD} ${LIBDTRACE} ${LIBY} ${LIBL} ${LIBPROC} \
 		${LIBCTF} ${LIBELF} ${LIBZ} ${LIBRT} ${LIBUTIL} \
 		${LIBRTLD_DB}
 LDADD=		-lpthread -ldtrace -ly -ll -lproc -lctf -lelf -lz -lrt -lutil \
 		-lrtld_db
 
 .include <bsd.prog.mk>