diff --git a/newlib/ChangeLog b/newlib/ChangeLog
index 3d75c12c3..e30ea2124 100644
--- a/newlib/ChangeLog
+++ b/newlib/ChangeLog
@@ -1,3 +1,8 @@
+2003-01-24  Corinna Vinschen  <corinna@vinschen.de>
+
+	* libc/include/sys/unistd.h: Add setregid and setreuid declarations
+	for Cygwin.
+
 2003-01-21 Anita Kulkarni  <anitak@kpit.com>
   
 	* libc/time/difftime.c : Typecast the result to double.
diff --git a/newlib/libc/include/sys/unistd.h b/newlib/libc/include/sys/unistd.h
index 1e5f519dd..270be89aa 100644
--- a/newlib/libc/include/sys/unistd.h
+++ b/newlib/libc/include/sys/unistd.h
@@ -106,6 +106,10 @@ int	_EXFUN(setgroups, (int ngroups, const gid_t *grouplist ));
 #endif
 int     _EXFUN(setpgid, (pid_t __pid, pid_t __pgid ));
 int     _EXFUN(setpgrp, (void ));
+#if defined(__CYGWIN__)
+int	_EXFUN(setregid, (gid_t __rgid, gid_t __egid));
+int	_EXFUN(setreuid, (uid_t __ruid, uid_t __euid));
+#endif
 pid_t   _EXFUN(setsid, (void ));
 int     _EXFUN(setuid, (uid_t __uid ));
 #if defined(__CYGWIN__)