diff --git a/ChangeLog b/ChangeLog
index 82f4034ce..32f57bd91 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -7,6 +7,8 @@
    Vinschen <vinschen@redhat.com>
  - (bal) Add /etc/sysconfig/sshd support to redhat's sshd.init. Patch by
    Pekka Savola <pekkas@netcore.fi>
+ - (bal) Cygwin lacks setgroups() API.  Patch by Corinna Vinschen 
+   <vinschen@redhat.com>
 
 20010425
  - OpenBSD CVS Sync
@@ -5262,4 +5264,4 @@
  - Wrote replacements for strlcpy and mkdtemp
  - Released 1.0pre1
 
-$Id: ChangeLog,v 1.1175 2001/04/27 00:46:17 mouring Exp $
+$Id: ChangeLog,v 1.1176 2001/04/27 02:10:15 mouring Exp $
diff --git a/uidswap.c b/uidswap.c
index 2c43877d6..3b264cf9e 100644
--- a/uidswap.c
+++ b/uidswap.c
@@ -80,9 +80,11 @@ temporarily_use_uid(struct passwd *pw)
 		if (user_groupslen < 0)
 			fatal("getgroups: %.100s", strerror(errno));
 	}
+#ifndef HAVE_CYGWIN
 	/* Set the effective uid to the given (unprivileged) uid. */
 	if (setgroups(user_groupslen, user_groups) < 0)
 		fatal("setgroups: %.100s", strerror(errno));
+#endif /* !HAVE_CYWIN */
 #ifndef SAVED_IDS_WORK_WITH_SETEUID
 	/* Propagate the privileged gid to all of our gids. */
 	if (setgid(getegid()) < 0)
@@ -130,8 +132,10 @@ restore_uid(void)
 	setgid(getgid());
 #endif /* SAVED_IDS_WORK_WITH_SETEUID */
 
+#ifndef HAVE_CYGWIN
 	if (setgroups(saved_egroupslen, saved_egroups) < 0)
 		fatal("setgroups: %.100s", strerror(errno));
+#endif /* !HAVE_CYGWIN */
 	temporarily_use_uid_effective = 0;
 }