diff --git a/include/unistd.h b/include/unistd.h
index 9db3112af4c2..2d68ad27ae1c 100644
--- a/include/unistd.h
+++ b/include/unistd.h
@@ -115,6 +115,7 @@ int	 fchdir __P((int));
 int	 fchown __P((int, int, int));
 int	 fsync __P((int));
 int	 ftruncate __P((int, off_t));
+int	 getdomainname __P((char *, int));
 int	 getdtablesize __P((void));
 long	 gethostid __P((void));
 int	 gethostname __P((char *, int));
@@ -145,6 +146,7 @@ int	 rresvport __P((int *));
 int	 ruserok __P((const char *, int, const char *, const char *));
 char	*sbrk __P((int));
 int	 select __P((int, fd_set *, fd_set *, fd_set *, struct timeval *));
+int	 setdomainname __P((const char *, int));
 int	 setegid __P((gid_t));
 int	 seteuid __P((uid_t));
 int	 setgroups __P((int, const gid_t *));