diff --git a/usr.sbin/setextattr/Makefile b/usr.sbin/setextattr/Makefile
index dc2ecfca3d2..7eaf13216fd 100644
--- a/usr.sbin/setextattr/Makefile
+++ b/usr.sbin/setextattr/Makefile
@@ -3,4 +3,6 @@
 PROG=	setextattr
 MAN=	setextattr.8
 
+WARNS?=	2
+
 .include <bsd.prog.mk>
diff --git a/usr.sbin/setextattr/setextattr.c b/usr.sbin/setextattr/setextattr.c
index bdf21436314..df7be4f1d3d 100644
--- a/usr.sbin/setextattr/setextattr.c
+++ b/usr.sbin/setextattr/setextattr.c
@@ -38,6 +38,8 @@
 #include <stdlib.h>
 #include <string.h>
 
+void usage(void);
+
 void
 usage(void)
 {