diff --git a/usr.bin/lockf/Makefile b/usr.bin/lockf/Makefile
index 77d89c45bbdf..b0df209a29b9 100644
--- a/usr.bin/lockf/Makefile
+++ b/usr.bin/lockf/Makefile
@@ -1,6 +1,6 @@
 # $FreeBSD$
 
 PROG=	lockf
-CFLAGS+=-Wall
+WARNS?=	2
 
 .include <bsd.prog.mk>
diff --git a/usr.bin/lockf/lockf.c b/usr.bin/lockf/lockf.c
index 0a91048cafc4..6c08ff91fcc0 100644
--- a/usr.bin/lockf/lockf.c
+++ b/usr.bin/lockf/lockf.c
@@ -193,7 +193,7 @@ killed(int sig)
  * Signal handler for SIGALRM.
  */
 static void
-timeout(int sig)
+timeout(int sig __unused)
 {
     timed_out = 1;
 }
diff --git a/usr.bin/mktemp/Makefile b/usr.bin/mktemp/Makefile
index 76ebee6f360b..b4d6a2fb9633 100644
--- a/usr.bin/mktemp/Makefile
+++ b/usr.bin/mktemp/Makefile
@@ -1,5 +1,6 @@
 # $FreeBSD$
 
 PROG=	mktemp
+WARNS?=	2
 
 .include <bsd.prog.mk>
diff --git a/usr.bin/mktemp/mktemp.c b/usr.bin/mktemp/mktemp.c
index 3fe079f380b7..d20ca3dfcdbb 100644
--- a/usr.bin/mktemp/mktemp.c
+++ b/usr.bin/mktemp/mktemp.c
@@ -52,7 +52,8 @@ int
 main(int argc, char **argv)
 {
 	int c, fd, ret;
-	char *tmpdir, *prefix;
+	char *tmpdir;
+	const char *prefix;
 	char *name;
 	int dflag, qflag, tflag, uflag;
 
diff --git a/usr.bin/ncplogin/Makefile b/usr.bin/ncplogin/Makefile
index 8795f29f3ad1..a2473b727090 100644
--- a/usr.bin/ncplogin/Makefile
+++ b/usr.bin/ncplogin/Makefile
@@ -2,6 +2,7 @@
 
 PROG=	ncplogin
 MAN=	ncplogin.1 ncplogout.1
+WARNS?=	2
 
 LINKS=	${BINDIR}/ncplogin ${BINDIR}/ncplogout
 
diff --git a/usr.bin/ncplogin/ncplogin.c b/usr.bin/ncplogin/ncplogin.c
index 3841dcc90321..3302473b0c58 100644
--- a/usr.bin/ncplogin/ncplogin.c
+++ b/usr.bin/ncplogin/ncplogin.c
@@ -47,14 +47,14 @@
 extern char *__progname;
 
 static void
-login_usage() {
+login_usage(void) {
 	printf("usage: %s [-Dh] [-A host] [-BCN] [-I level] [-M mode] \n"
 	       "       [-R retrycount] [-W timeout] /server:user\n", __progname);
 	exit(1);
 }
 
 static void
-logout_usage() {
+logout_usage(void) {
 	printf("usage: %s [-c handle] [-h] [/server:user]\n", __progname);
 	exit(1);
 }