diff --git a/usr.bin/tty/Makefile b/usr.bin/tty/Makefile
index 5b914b23a4eb..14ed68fa5ebf 100644
--- a/usr.bin/tty/Makefile
+++ b/usr.bin/tty/Makefile
@@ -1,5 +1,7 @@
+# $FreeBSD$
 #	@(#)Makefile	8.1 (Berkeley) 6/6/93
 
 PROG=	tty
+WARNS?=	2
 
 .include <bsd.prog.mk>
diff --git a/usr.bin/tty/tty.c b/usr.bin/tty/tty.c
index 5753e34069f5..00e7d57c4afc 100644
--- a/usr.bin/tty/tty.c
+++ b/usr.bin/tty/tty.c
@@ -57,7 +57,7 @@ main(argc, argv)
 	char **argv;
 {
 	int ch, sflag;
-	char *t, *ttyname();
+	char *t;
 
 	sflag = 0;
 	while ((ch = getopt(argc, argv, "s")) != -1)