diff --git a/bin/chflags/chflags.c b/bin/chflags/chflags.c
index ebd3a7ebb3b7..b2e6c2368264 100644
--- a/bin/chflags/chflags.c
+++ b/bin/chflags/chflags.c
@@ -57,7 +57,6 @@ __FBSDID("$FreeBSD$");
 #include <string.h>
 #include <unistd.h>
 
-int	main(int, char *[]);
 void	usage(void);
 
 int
diff --git a/usr.bin/basename/basename.c b/usr.bin/basename/basename.c
index 9650bdbbb0cb..20c056270627 100644
--- a/usr.bin/basename/basename.c
+++ b/usr.bin/basename/basename.c
@@ -53,7 +53,6 @@ __FBSDID("$FreeBSD$");
 #include <string.h>
 #include <unistd.h>
 
-int main(int, char **);
 void usage(void);
 
 int
diff --git a/usr.bin/chat/chat.c b/usr.bin/chat/chat.c
index 1b99e6935f76..2be228a043eb 100644
--- a/usr.bin/chat/chat.c
+++ b/usr.bin/chat/chat.c
@@ -217,8 +217,6 @@ void pack_array(char **array, int end);
 char *expect_strtok(char *, char *);
 int vfmtmsg(char *, int, const char *, va_list);	/* vsprintf++ */
 
-int main(int, char *[]);
-
 void *dup_mem(b, c)
 void *b;
 size_t c;
diff --git a/usr.bin/chflags/chflags.c b/usr.bin/chflags/chflags.c
index ebd3a7ebb3b7..b2e6c2368264 100644
--- a/usr.bin/chflags/chflags.c
+++ b/usr.bin/chflags/chflags.c
@@ -57,7 +57,6 @@ __FBSDID("$FreeBSD$");
 #include <string.h>
 #include <unistd.h>
 
-int	main(int, char *[]);
 void	usage(void);
 
 int
diff --git a/usr.bin/col/col.c b/usr.bin/col/col.c
index ea9a98d4ecbf..73d4e0fdce1c 100644
--- a/usr.bin/col/col.c
+++ b/usr.bin/col/col.c
@@ -100,7 +100,6 @@ void	flush_line(LINE *);
 void	flush_lines(int);
 void	flush_blanks(void);
 void	free_line(LINE *);
-int	main(int, char **);
 void	usage(void);
 
 CSET	last_set;		/* char_set of last char printed */
diff --git a/usr.bin/colcrt/colcrt.c b/usr.bin/colcrt/colcrt.c
index 116daee57c8a..6cd9be6ef3f5 100644
--- a/usr.bin/colcrt/colcrt.c
+++ b/usr.bin/colcrt/colcrt.c
@@ -75,7 +75,6 @@ char	printall;
 
 FILE	*f;
 
-int		main(int, char *[]);
 static void	move(int, int);
 static void	pflush(int);
 static int	plus(char, char);
diff --git a/usr.bin/cut/cut.c b/usr.bin/cut/cut.c
index dbb645e5be21..6824a565d667 100644
--- a/usr.bin/cut/cut.c
+++ b/usr.bin/cut/cut.c
@@ -64,7 +64,6 @@ void	b_n_cut(FILE *, const char *);
 void	c_cut(FILE *, const char *);
 void	f_cut(FILE *, const char *);
 void	get_list(char *);
-int	main(int, char **);
 void	needpos(size_t);
 static 	void usage(void);
 
diff --git a/usr.bin/hesinfo/hesinfo.c b/usr.bin/hesinfo/hesinfo.c
index 98c700d72ad0..7bbaead2f8ed 100644
--- a/usr.bin/hesinfo/hesinfo.c
+++ b/usr.bin/hesinfo/hesinfo.c
@@ -29,8 +29,6 @@ __FBSDID("$FreeBSD$");
 #include <string.h>
 #include <unistd.h>
 
-int	main(int, char **);
-
 int 
 main(argc, argv)
 	int	argc;
diff --git a/usr.bin/id/id.c b/usr.bin/id/id.c
index 4e5ca0000da2..5d43e9fcda2c 100644
--- a/usr.bin/id/id.c
+++ b/usr.bin/id/id.c
@@ -55,7 +55,6 @@ __FBSDID("$FreeBSD$");
 #include <string.h>
 #include <unistd.h>
 
-int	main(int, char *[]);
 void	current(void);
 void	pline(struct passwd *);
 void	pretty(struct passwd *);
diff --git a/usr.bin/make/nonints.h b/usr.bin/make/nonints.h
index 994756074862..ab442283ecef 100644
--- a/usr.bin/make/nonints.h
+++ b/usr.bin/make/nonints.h
@@ -63,7 +63,6 @@ void For_Run(void);
 
 /* main.c */
 void Main_ParseArgLine(char *);
-int main(int, char **);
 char *Cmd_Exec(char *, char **);
 void Error(const char *, ...);
 void Fatal(const char *, ...);
diff --git a/usr.bin/msgs/msgs.c b/usr.bin/msgs/msgs.c
index 5af40e9fadef..d1d3bd426f5f 100644
--- a/usr.bin/msgs/msgs.c
+++ b/usr.bin/msgs/msgs.c
@@ -154,7 +154,6 @@ jmp_buf	tstpbuf;
 void	ask(const char *);
 void	gfrsub(FILE *);
 int	linecnt(FILE *);
-int	main(int, char *[]);
 int	next(char *);
 char	*nxtfld(unsigned char *);
 void	onsusp(int);
diff --git a/usr.bin/nl/nl.c b/usr.bin/nl/nl.c
index 5fcfb2a6d9be..43a702702383 100644
--- a/usr.bin/nl/nl.c
+++ b/usr.bin/nl/nl.c
@@ -93,7 +93,6 @@ static struct numbering_property numbering_properties[NP_LAST + 1] = {
 	((sizeof (int) * CHAR_BIT - 1) * 302 / 1000 + 2)
 
 static void	filter(void);
-int		main(int, char *[]);
 static void	parse_numbering(const char *, int);
 static void	usage(void);
 
diff --git a/usr.bin/rpcinfo/rpcinfo.c b/usr.bin/rpcinfo/rpcinfo.c
index f184fdc7d435..bbe6a17ba071 100644
--- a/usr.bin/rpcinfo/rpcinfo.c
+++ b/usr.bin/rpcinfo/rpcinfo.c
@@ -156,8 +156,6 @@ static char	*spaces(int);
 static bool_t	add_version(struct rpcbdump_short *, u_long);
 static bool_t	add_netid(struct rpcbdump_short *, char *);
 
-int		main(int argc, char **argv);
-
 int
 main(int argc, char **argv)
 {
diff --git a/usr.bin/talk/talk.c b/usr.bin/talk/talk.c
index bea31fb0a7a5..8e3f540055bb 100644
--- a/usr.bin/talk/talk.c
+++ b/usr.bin/talk/talk.c
@@ -64,8 +64,6 @@ static const char copyright[] =
  *		Fixed to not run with unwriteable terminals MRVM 28/12/94
  */
 
-int main(int, char **);
-
 int
 main(argc, argv)
 	int argc;
diff --git a/usr.bin/touch/touch.c b/usr.bin/touch/touch.c
index ce2e712815bd..7482674c86d4 100644
--- a/usr.bin/touch/touch.c
+++ b/usr.bin/touch/touch.c
@@ -58,7 +58,6 @@ static const char sccsid[] = "@(#)touch.c	8.1 (Berkeley) 6/6/93";
 #include <time.h>
 #include <unistd.h>
 
-int	main(int, char *[]);
 int	rw(char *, struct stat *, int);
 void	stime_arg1(char *, struct timeval *);
 void	stime_arg2(char *, int, struct timeval *);
diff --git a/usr.bin/unifdef/unifdef.c b/usr.bin/unifdef/unifdef.c
index 3541952b087b..0a76d56c10e2 100644
--- a/usr.bin/unifdef/unifdef.c
+++ b/usr.bin/unifdef/unifdef.c
@@ -222,7 +222,6 @@ int             findsym(const char *);
 void            flushline(bool);
 int             getline(char *, int, FILE *, bool);
 Linetype        ifeval(const char **);
-int             main(int, char **);
 const char     *skipcomment(const char *);
 const char     *skipquote(const char *, Quote_state);
 const char     *skipsym(const char *);