diff --git a/usr.bin/systat/Makefile b/usr.bin/systat/Makefile
index 4f5f229725b6..e4f8c4041a76 100644
--- a/usr.bin/systat/Makefile
+++ b/usr.bin/systat/Makefile
@@ -9,6 +9,10 @@ SRCS=	cmds.c cmdtab.c devs.c fetch.c iostat.c keyboard.c main.c \
 	mode.c ip.c tcp.c \
 	vmstat.c convtbl.c ifcmds.c ifstat.c
 
+.if ${MACHINE_ARCH} == "i386" || ${MACHINE_ARCH} == "amd64"
+WARNS?=	6
+.endif
+
 .if ${MK_INET6_SUPPORT} != "no"
 SRCS+=	icmp6.c ip6.c
 CFLAGS+= -DINET6