diff --git a/usr.bin/limits/Makefile b/usr.bin/limits/Makefile
index 013317824db1..5999cdbe060c 100644
--- a/usr.bin/limits/Makefile
+++ b/usr.bin/limits/Makefile
@@ -3,5 +3,6 @@
 PROG=	limits
 DPADD=	${LIBUTIL}
 LDADD=	-lutil
+WARNS?=	6
 
 .include <bsd.prog.mk>