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diff --git a/source/blender/freestyle/intern/system/TimeStamp.h b/source/blender/freestyle/intern/system/TimeStamp.h
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+/*
+ * ***** BEGIN GPL LICENSE BLOCK *****
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * The Original Code is Copyright (C) 2010 Blender Foundation.
+ * All rights reserved.
+ *
+ * The Original Code is: all of this file.
+ *
+ * Contributor(s): none yet.
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+#ifndef __FREESTYLE_TIME_STAMP_H__
+#define __FREESTYLE_TIME_STAMP_H__
+
+/** \file blender/freestyle/intern/system/TimeStamp.h
+ *  \ingroup freestyle
+ *  \brief Class defining a singleton used as timestamp
+ *  \author Stephane Grabli
+ *  \date 12/12/2002
+ */
+
+#include "FreestyleConfig.h"
+
+class LIB_SYSTEM_EXPORT TimeStamp
+{
+public:
+	static inline TimeStamp *instance()
+	{
+		if (_instance == NULL)
+			_instance = new TimeStamp;
+		return _instance;
+	}
+
+	inline unsigned getTimeStamp() const
+	{
+		return _time_stamp;
+	}
+
+	inline void increment()
+	{
+		++_time_stamp;
+	}
+
+	inline void reset()
+	{
+		_time_stamp = 1;
+	}
+
+protected:
+	TimeStamp()
+	{
+		_time_stamp = 1;
+	}
+
+	TimeStamp(const TimeStamp&) {}
+
+private:
+	static TimeStamp *_instance;
+	unsigned _time_stamp;
+};
+
+#endif // __FREESTYLE_TIME_STAMP_H__