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diff --git a/gdb/config/m68k/tm-m68klynx.h b/gdb/config/m68k/tm-m68klynx.h
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+/* Macro definitions for Motorola 680x0 running under LynxOS.
+ Copyright 1993 Free Software Foundation, Inc.
+
+ This file is part of GDB.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#ifndef TM_M68KLYNX_H
+#define TM_M68KLYNX_H
+
+#include "tm-lynx.h"
+
+/* If PC-2 contains this instruction, then we know what we are in a system
+ call stub, and the return PC is is at SP+4, instead of SP. */
+
+#define SYSCALL_TRAP 0x4e4a /* trap #10 */
+#define SYSCALL_TRAP_OFFSET 2 /* PC is after trap instruction */
+
+/* Use the generic 68k definitions. */
+
+#include "m68k/tm-m68k.h"
+
+/* Disable dumbshit alternate breakpoint mechanism needed by 68k stub. */
+#undef REMOTE_BREAKPOINT
+
+#endif /* TM_M68KLYNX_H */