diff --git a/sysdeps/unix/sysv/aix/setgid.c b/sysdeps/unix/sysv/aix/setgid.c
new file mode 100644
index 0000000000..bf976ec72e
--- /dev/null
+++ b/sysdeps/unix/sysv/aix/setgid.c
@@ -0,0 +1,32 @@
+/* Copyright (C) 2000 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <unistd.h>
+
+
+/* is there a reason *NOT* to include <sys/id.h>?  If so #define ID_REAL */
+#include <sys/id.h>
+
+extern int setgidx (int mask, gid_t gid);
+
+int
+__setgid (gid_t gid)
+{
+  return setgidx (ID_REAL, gid);
+}
+strong_alias (__setgid, setgid)