diff --git a/usr.bin/col/col.c b/usr.bin/col/col.c
index 1544608c28d0..78e978091582 100644
--- a/usr.bin/col/col.c
+++ b/usr.bin/col/col.c
@@ -92,22 +92,22 @@ struct line_str {
 	int	l_max_col;		/* max column in the line */
 };
 
-LINE   *alloc_line(void);
-void	dowarn(int);
-void	flush_line(LINE *);
-void	flush_lines(int);
-void	flush_blanks(void);
-void	free_line(LINE *);
-void	usage(void);
+static LINE   *alloc_line(void);
+static void	dowarn(int);
+static void	flush_line(LINE *);
+static void	flush_lines(int);
+static void	flush_blanks(void);
+static void	free_line(LINE *);
+static void	usage(void);
 
-CSET	last_set;		/* char_set of last char printed */
-LINE   *lines;
-int	compress_spaces;	/* if doing space -> tab conversion */
-int	fine;			/* if `fine' resolution (half lines) */
-int	max_bufd_lines;		/* max # lines to keep in memory */
-int	nblank_lines;		/* # blanks after last flushed line */
-int	no_backspaces;		/* if not to output any backspaces */
-int	pass_unknown_seqs;	/* pass unknown control sequences */
+static CSET	last_set;		/* char_set of last char printed */
+static LINE    *lines;
+static int	compress_spaces;	/* if doing space -> tab conversion */
+static int	fine;			/* if `fine' resolution (half lines) */
+static int	max_bufd_lines;		/* max # lines to keep in memory */
+static int	nblank_lines;		/* # blanks after last flushed line */
+static int	no_backspaces;		/* if not to output any backspaces */
+static int	pass_unknown_seqs;	/* pass unknown control sequences */
 
 #define	PUTC(ch) \
 	do {					\
@@ -334,7 +334,7 @@ main(int argc, char **argv)
 	exit(0);
 }
 
-void
+static void
 flush_lines(int nflush)
 {
 	LINE *l;
@@ -360,7 +360,7 @@ flush_lines(int nflush)
  * is the number of half line feeds, otherwise it is the number of whole line
  * feeds.
  */
-void
+static void
 flush_blanks(void)
 {
 	int half, i, nb;
@@ -389,7 +389,7 @@ flush_blanks(void)
  * Write a line to stdout taking care of space to tab conversion (-h flag)
  * and character set shifts.
  */
-void
+static void
 flush_line(LINE *l)
 {
 	CHAR *c, *endc;
@@ -502,7 +502,7 @@ flush_line(LINE *l)
 
 static LINE *line_freelist;
 
-LINE *
+static LINE *
 alloc_line(void)
 {
 	LINE *l;
@@ -523,7 +523,7 @@ alloc_line(void)
 	return (l);
 }
 
-void
+static void
 free_line(LINE *l)
 {
 
@@ -531,7 +531,7 @@ free_line(LINE *l)
 	line_freelist = l;
 }
 
-void
+static void
 usage(void)
 {
 
@@ -539,7 +539,7 @@ usage(void)
 	exit(1);
 }
 
-void
+static void
 dowarn(int line)
 {