diff --git a/usr.sbin/zic/zic/Makefile b/usr.sbin/zic/zic/Makefile
index 9702c4c4b30f..36cc79009b45 100644
--- a/usr.sbin/zic/zic/Makefile
+++ b/usr.sbin/zic/zic/Makefile
@@ -1,5 +1,7 @@
 # $FreeBSD$
 
+.include <src.opts.mk>
+
 .PATH: ${SRCTOP}/contrib/tzcode/zic
 
 PROG=	zic
@@ -13,4 +15,8 @@ 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>