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diff --git a/ETL/ETL/_mutex_pthreads_simple.h b/ETL/ETL/_mutex_pthreads_simple.h
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+++ b/ETL/ETL/_mutex_pthreads_simple.h
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+/*! ========================================================================
+** Extended Template and Library
+** Mutex Abstraction Class Implementation
+** $Id$
+**
+** Copyright (c) 2002 Robert B. Quattlebaum Jr.
+** Copyright (c) 2008 Chris Moore
+**
+** This package 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 package 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.
+**
+** === N O T E S ===========================================================
+**
+** This is an internal header file, included by other ETL headers.
+** You should not attempt to use it directly.
+**
+** ========================================================================= */
+
+/* === S T A R T =========================================================== */
+
+#ifndef __ETL__MUTEX_PTHREADS_SIMPLE_H_
+#define __ETL__MUTEX_PTHREADS_SIMPLE_H_
+
+/* === H E A D E R S ======================================================= */
+
+#include <pthread.h>
+
+/* === M A C R O S ========================================================= */
+
+/* === C L A S S E S & S T R U C T S ======================================= */
+
+_ETL_BEGIN_NAMESPACE
+
+class mutex
+{
+	pthread_mutex_t	mtx;
+public:
+			mutex()			{ pthread_mutex_init(&mtx,NULL);	}
+		   ~mutex()			{ pthread_mutex_destroy(&mtx);		}
+	void	lock_mutex()	{ pthread_mutex_lock(&mtx);			}
+	void	unlock_mutex()	{ pthread_mutex_unlock(&mtx);		}
+
+	//! Exception-safe mutex lock class
+	class lock
+	{
+		mutex *_mtx;
+	public:
+		 lock(mutex &x):_mtx(&x)	{ _mtx->lock_mutex();		}
+		~lock()						{ _mtx->unlock_mutex();		}
+	};
+};
+
+_ETL_END_NAMESPACE
+
+/* === E N D =============================================================== */
+
+#endif