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diff --git a/source/blender/freestyle/intern/system/Cast.h b/source/blender/freestyle/intern/system/Cast.h
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+++ b/source/blender/freestyle/intern/system/Cast.h
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+//
+//  Filename         : Cast.h
+//  Author(s)        : Emmanuel Turquin
+//  Purpose          : Cast function
+//  Date of creation : 01/07/2003
+//
+///////////////////////////////////////////////////////////////////////////////
+
+
+//
+//  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  CAST_HPP
+# define CAST_HPP
+
+namespace Cast {
+
+  template <class T, class U>
+  U* cast(T* in) {
+    if (!in)
+      return NULL;
+    return dynamic_cast<U*>(in);
+  }
+
+} // end of namespace Cast
+
+#endif // CAST_HPP