diff --git a/sbin/dumpon/Makefile b/sbin/dumpon/Makefile
index 2134cd52b8d..c273f93470a 100644
--- a/sbin/dumpon/Makefile
+++ b/sbin/dumpon/Makefile
@@ -1,7 +1,7 @@
 # $FreeBSD$
 
 PROG=	dumpon
-WARNS?=	4
+WARNS?=	6
 MAN=	dumpon.8
 
 .include <bsd.prog.mk>