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diff --git a/source/blender/compositor/nodes/COM_GroupNode.h b/source/blender/compositor/nodes/COM_GroupNode.h
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+++ b/source/blender/compositor/nodes/COM_GroupNode.h
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+/*
+ * Copyright 2011, Blender Foundation.
+ *
+ * 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.
+ *
+ * Contributor: 
+ *		Jeroen Bakker 
+ *		Monique Dewanchand
+ */
+
+#ifndef _COM_GroupNode_h_
+#define _COM_GroupNode_h_
+
+#include "COM_Node.h"
+#include "COM_ExecutionSystem.h"
+
+/**
+  * @brief Represents a group node
+  * @ingroup Node
+  */
+class GroupNode: public Node {
+public:
+	GroupNode(bNode *editorNode);
+	void convertToOperations(ExecutionSystem* graph, CompositorContext * context);
+
+	/**
+	  * @brief check if this node a group node.
+	  * @returns true
+	  */
+	bool isGroupNode() const { return true; }
+
+	/**
+	  * @brief ungroup this group node.
+	  * during ungroup the subtree (internal nodes and links) of the group node
+	  * are added to the ExecutionSystem.
+	  *
+	  * Between the main tree and the subtree proxy nodes will be added
+	  * to translate between InputSocket and OutputSocket
+	  *
+	  * @param system the ExecutionSystem where to add the subtree
+	  */
+	void ungroup(ExecutionSystem &system);
+};
+
+#endif