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diff --git a/cpukit/include/rtems/score/coremutex.h b/cpukit/include/rtems/score/coremutex.h
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+++ b/cpukit/include/rtems/score/coremutex.h
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+/**
+ * @file
+ *
+ * @brief CORE Mutex API
+ *
+ * This include file contains all the constants and structures associated with
+ * the Mutex Handler.  A mutex is an enhanced version of the standard Dijkstra
+ * binary semaphore used to provide synchronization and mutual exclusion
+ * capabilities.
+ */
+
+/*
+ *  COPYRIGHT (c) 1989-2011.
+ *  On-Line Applications Research Corporation (OAR).
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.rtems.org/license/LICENSE.
+ */
+
+#ifndef _RTEMS_SCORE_COREMUTEX_H
+#define _RTEMS_SCORE_COREMUTEX_H
+
+#include <rtems/score/thread.h>
+#include <rtems/score/threadq.h>
+#include <rtems/score/priority.h>
+#include <rtems/score/watchdog.h>
+#include <rtems/score/interr.h>
+
+struct _Scheduler_Control;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ *  @defgroup ScoreMutex Mutex Handler
+ *
+ *  @ingroup Score
+ *
+ *  This handler encapsulates functionality which provides the foundation
+ *  Mutex services used in all of the APIs supported by RTEMS.
+ */
+/**@{*/
+
+/**
+ *  @brief Control block used to manage each mutex.
+ *
+ *  The following defines the control block used to manage each mutex.
+ */
+typedef struct {
+  /**
+   * @brief The thread queue of this mutex.
+   *
+   * The owner of the thread queue indicates the mutex owner.
+   */
+  Thread_queue_Control Wait_queue;
+} CORE_mutex_Control;
+
+/**
+ * @brief The recursive mutex control.
+ */
+typedef struct {
+  /**
+   * @brief The plain non-recursive mutex.
+   */
+  CORE_mutex_Control Mutex;
+
+  /**
+   * @brief The nest level in case of a recursive seize.
+   */
+  unsigned int nest_level;
+} CORE_recursive_mutex_Control;
+
+/**
+ * @brief The recursive mutex control with priority ceiling protocol support.
+ */
+typedef struct {
+  /**
+   * @brief The plain recursive mutex.
+   */
+  CORE_recursive_mutex_Control Recursive;
+
+  /**
+   * @brief The priority ceiling node for the mutex owner.
+   */
+  Priority_Node Priority_ceiling;
+
+#if defined(RTEMS_SMP)
+  /**
+   * @brief The scheduler instance for this priority ceiling mutex.
+   */
+  const struct _Scheduler_Control *scheduler;
+#endif
+} CORE_ceiling_mutex_Control;
+
+/**@}*/
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+/*  end of include file */