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diff --git a/bits/msq.h b/bits/msq.h
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+/* Copyright (C) 1995, 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
+
+   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.  */
+
+#ifndef _SYS_MSG_H
+#error "Never use <bits/msq.h> directly; include <sys/msg.h> instead."
+#endif
+
+
+#include <features.h>
+#include <sys/types.h>
+
+/* Define options for message queue functions.  */
+#define MSG_NOERROR	010000	/* no error if message is too big */
+
+__BEGIN_DECLS
+
+/* Structure of record for one message inside the kernel.
+   The type `struct __msg' is opaque.  */
+struct msqid_ds
+{
+  struct ipc_perm msg_perm;	/* structure describing operation permission */
+  __time_t msg_stime;		/* time of last msgsnd command */
+  __time_t msg_rtime;		/* time of last msgrcv command */
+  __time_t msg_ctime;		/* time of last change */
+  unsigned short int msg_qnum;	/* number of messages currently on queue */
+  unsigned short int msg_qbytes;/* max number of bytes allowed on queue */
+  __pid_t msg_lspid;		/* pid of last msgsnd() */
+  __pid_t msg_lrpid;		/* pid of last msgrcv() */
+};
+
+__END_DECLS