diff --git a/usr.bin/colcrt/Makefile b/usr.bin/colcrt/Makefile
index 9bb24b735b8f..47a27e79ca4a 100644
--- a/usr.bin/colcrt/Makefile
+++ b/usr.bin/colcrt/Makefile
@@ -1,6 +1,7 @@
 #	@(#)Makefile	8.1 (Berkeley) 6/6/93
+# $FreeBSD$
 
 PROG=	colcrt
-CFLAGS+=-Wall
+WARNS?=	2
 
 .include <bsd.prog.mk>
diff --git a/usr.bin/colcrt/colcrt.c b/usr.bin/colcrt/colcrt.c
index 4b5b525f6ef1..fd1f4a35c6c2 100644
--- a/usr.bin/colcrt/colcrt.c
+++ b/usr.bin/colcrt/colcrt.c
@@ -73,10 +73,11 @@ char	printall;
 
 FILE	*f;
 
-static void usage __P((void));
-static void pflush __P((int));
-static int plus __P((char, char));
-static void move __P((int, int));
+int		main __P((int, char *[]));
+static void	move __P((int, int));
+static void	pflush __P((int));
+static int	plus __P((char, char));
+static void	usage __P((void));
 
 int
 main(argc, argv)