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diff --git a/src/imageplugins/charcoal/charcoal.h b/src/imageplugins/charcoal/charcoal.h
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+/* ============================================================
+ *
+ * This file is a part of digiKam project
+ * http://www.digikam.org
+ *
+ * Date        : 2005-05-25
+ * Description : Charcoal threaded image filter.
+ *
+ * Copyright (C) 2005-2007 by Gilles Caulier <caulier dot gilles at gmail dot com>
+ *
+ * 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, 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.
+ * 
+ * ============================================================ */
+  
+#ifndef CHARCOAL_H
+#define CHARCOAL_H
+
+// Digikam includes.
+
+#include "dimgthreadedfilter.h"
+
+namespace DigikamCharcoalImagesPlugin
+{
+
+class Charcoal : public Digikam::DImgThreadedFilter
+{
+
+public:
+    
+    Charcoal(Digikam::DImg *orgImage, TQObject *parent=0, double pencil=5.0, double smooth=10.0);
+    ~Charcoal(){};
+            
+private:
+
+    void filterImage(void);
+    bool convolveImage(const unsigned int order, const double *kernel);
+    int  getOptimalKernelWidth(double radius, double sigma);
+
+private:
+
+    double m_pencil;
+    double m_smooth;
+};    
+
+}  // NameSpace DigikamCharcoalImagesPlugin
+
+#endif /* CHARCOAL_H */