diff --git a/newlib/ChangeLog b/newlib/ChangeLog
index 14369fa17..d36f4ad99 100644
--- a/newlib/ChangeLog
+++ b/newlib/ChangeLog
@@ -1,3 +1,8 @@
+2003-09-09  Corinna Vinschen  <corinna@vinschen.de>
+
+	* libc/include/grp.h: Don't define setgrfile, group_from_gid and
+	setgroupent for Cygwin.
+
 2003-09-05  Jeff Johnston  <jjohnstn@redhat.com>
 
 	* libc/stdlib/exit.c (exit): Setting of struct _atexit ptr p
diff --git a/newlib/libc/include/grp.h b/newlib/libc/include/grp.h
index 48a3d63b2..e453dca78 100644
--- a/newlib/libc/include/grp.h
+++ b/newlib/libc/include/grp.h
@@ -66,18 +66,24 @@ extern "C" {
 #ifndef __INSIDE_CYGWIN__
 struct group	*getgrgid (gid_t);
 struct group	*getgrnam (const char *);
+#ifndef __CYGWIN__
 int		 getgrnam_r (const char *, struct group *,
 			char *, size_t, struct group **);
 int		 getgrgid_r (gid_t, struct group *,
 			char *, size_t, struct group **);
+#endif /* !__CYGWIN__ */
 #ifndef _POSIX_SOURCE
 struct group	*getgrent (void);
 void		 setgrent (void);
 void		 endgrent (void);
+#ifndef __CYGWIN__
 void		 setgrfile (const char *);
+#endif /* !__CYGWIN__ */
 #ifndef _XOPEN_SOURCE
+#ifndef __CYGWIN__
 char		*group_from_gid (gid_t, int);
 int		 setgroupent (int);
+#endif /* !__CYGWIN__ */
 int		 initgroups (const char *, gid_t);
 #endif /* !_XOPEN_SOURCE */
 #endif /* !_POSIX_SOURCE */