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diff --git a/storage/innobase/include/sync0types.h b/storage/innobase/include/sync0types.h
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+/*****************************************************************************
+
+Copyright (c) 1995, 2009, Innobase Oy. All Rights Reserved.
+
+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; version 2 of the License.
+
+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
+
+*****************************************************************************/
+
+/**************************************************//**
+@file include/sync0types.h
+Global types for sync
+
+Created 9/5/1995 Heikki Tuuri
+*******************************************************/
+
+#ifndef sync0types_h
+#define sync0types_h
+
+/** Rename mutex_t to avoid name space collision on some systems */
+#define mutex_t ib_mutex_t
+/** InnoDB mutex */
+typedef struct mutex_struct		mutex_t;
+
+#endif