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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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+++ b/source/blender/freestyle/intern/system/TimeStamp.h
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+//
+//  Filename         : TimeStamp.h
+//  Author(s)        : Stephane Grabli
+//  Purpose          : Class defining a singleton used as timestamp
+//  Date of creation : 12/12/2002
+//
+///////////////////////////////////////////////////////////////////////////////
+
+
+//
+//  Copyright (C) : Please refer to the COPYRIGHT file distributed 
+//   with this source distribution. 
+//
+//  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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef  TIMESTAMP_H
+# define TIMESTAMP_H
+
+# include "FreestyleConfig.h"
+
+class LIB_SYSTEM_EXPORT TimeStamp 
+{
+ public:
+
+  static inline TimeStamp* instance() {
+    if (_instance == 0)
+      _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 // TIMESTAMP_H