--- freem/src/locktab.c	2025/02/28 20:51:20	1.2
+++ freem/src/locktab.c	2025/03/24 02:57:25	1.5
@@ -1,23 +1,11 @@
 /*
- *                            *
- *                           * *
- *                          *   *
- *                     ***************
- *                      * *       * *
- *                       *  MUMPS  *
- *                      * *       * *
- *                     ***************
- *                          *   *
- *                           * *
- *                            *
- *
- *   locktab.c
+ *   $Id: locktab.c,v 1.5 2025/03/24 02:57:25 snw Exp $
  *    lock table implementation
  *
  *  
- *   Author: Serena Willis <jpw@coherent-logic.com>
+ *   Author: Serena Willis <snw@coherent-logic.com>
  *    Copyright (C) 1998 MUG Deutschland
- *    Copyright (C) 2021 Coherent Logic Development LLC
+ *    Copyright (C) 2021, 2025 Coherent Logic Development LLC
  *
  *
  *   This file is part of FreeM.
@@ -35,6 +23,16 @@
  *   You should have received a copy of the GNU Affero Public License
  *   along with FreeM.  If not, see <https://www.gnu.org/licenses/>.
  *
+ *   $Log: locktab.c,v $
+ *   Revision 1.5  2025/03/24 02:57:25  snw
+ *   Shared memory compatibility fixes for OS/2
+ *
+ *   Revision 1.4  2025/03/09 19:14:25  snw
+ *   First phase of REUSE compliance and header reformat
+ *
+ *
+ * SPDX-FileCopyrightText:  (C) 2025 Coherent Logic Development LLC
+ * SPDX-License-Identifier: AGPL-3.0-or-later
  **/
 
 #include <stdio.h>
@@ -49,7 +47,7 @@
 #include "mref.h"
 #include "transact.h"
 
-#if !defined(__OpenBSD__) && !defined(__APPLE__)
+#if !defined(__OpenBSD__) && !defined(__APPLE__) && !defined(__OS2__)
 union semun {
     int              val;    /* Value for SETVAL */
     struct semid_ds *buf;    /* Buffer for IPC_STAT, IPC_SET */