Index: head/usr.sbin/zic/zic/Makefile
===================================================================
--- head/usr.sbin/zic/zic/Makefile	(revision 323571)
+++ head/usr.sbin/zic/zic/Makefile	(revision 323572)
@@ -1,16 +1,22 @@
 # $FreeBSD$
 
+.include <src.opts.mk>
+
 .PATH: ${SRCTOP}/contrib/tzcode/zic
 
 PROG=	zic
 MAN=	zic.8
 SRCS=	zic.c ialloc.c scheck.c
 
 CFLAGS+= -DTM_GMTOFF=tm_gmtoff -DTM_ZONE=tm_zone -DSTD_INSPIRED -DPCTS
 CFLAGS+= -DHAVE_LONG_DOUBLE -DTZDIR=\"${SHAREDIR}/zoneinfo\" -Demkdir=mkdir
 CFLAGS+= -DHAVE_STRERROR -DHAVE_UNISTD_H
 CFLAGS+= -I${.CURDIR:H} -I${SRCTOP}/contrib/tzcode/stdtime
 
 WARNS?=	2
+
+.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 50300
+CWARNFLAGS+=	-Wno-error=strict-overflow
+.endif
 
 .include <bsd.prog.mk>