diff --git a/sources/genericpanel.h b/sources/genericpanel.h
index 0aa929d27..52e8ea98f 100644
--- a/sources/genericpanel.h
+++ b/sources/genericpanel.h
@@ -93,15 +93,14 @@ class GenericPanel : public QTreeWidget {
 	// diagram-related methods
 	public:
 	virtual QTreeWidgetItem *addDiagram(Diagram *,
-									QTreeWidgetItem * = nullptr,
-									PanelOptions = AddAllChild);
+					    QTreeWidgetItem * = nullptr,
+					    PanelOptions = AddAllChild);
 	virtual QTreeWidgetItem *getItemForDiagram(Diagram *, bool * = nullptr);
-
 	protected:
 	virtual QTreeWidgetItem *updateDiagramItem(QTreeWidgetItem *,
-											   Diagram *,
-											   PanelOptions = AddAllChild,
-											   bool = false);
+						   Diagram *,
+						   PanelOptions = AddAllChild,
+						   bool = false);
 	virtual QTreeWidgetItem *fillDiagramItem(
 			QTreeWidgetItem *,
 			PanelOptions = AddAllChild,