diff --git a/Plugins/org.mitk.gui.qt.renderwindowmanager/src/internal/QmitkRenderWindowManagerView.h b/Plugins/org.mitk.gui.qt.renderwindowmanager/src/internal/QmitkRenderWindowManagerView.h
index 3639b3537e..74e36c2b46 100644
--- a/Plugins/org.mitk.gui.qt.renderwindowmanager/src/internal/QmitkRenderWindowManagerView.h
+++ b/Plugins/org.mitk.gui.qt.renderwindowmanager/src/internal/QmitkRenderWindowManagerView.h
@@ -1,79 +1,79 @@
 /*============================================================================
 
 The Medical Imaging Interaction Toolkit (MITK)
 
 Copyright (c) German Cancer Research Center (DKFZ)
 All rights reserved.
 
 Use of this source code is governed by a 3-clause BSD license that can be
 found in the LICENSE file.
 
 ============================================================================*/
 
 #ifndef QMITKRENDERWINDOWMANAGERVIEW_H
 #define QMITKRENDERWINDOWMANAGERVIEW_H
 
 // render window manager plugin
 #include "ui_QmitkRenderWindowManagerControls.h"
 
 // render window manager UI module
 #include <QmitkRenderWindowDataStorageInspector.h>
 
 // mitk gui qt application
 #include <QmitkDataNodeContextMenu.h>
 
 // mitk gui common plugin
 #include <mitkIRenderWindowPartListener.h>
 
 // mitk gui qt common plugin
 #include <QmitkAbstractView.h>
 
 /**
 * @brief RenderWindowManager
 */
 class QmitkRenderWindowManagerView : public QmitkAbstractView, public mitk::IRenderWindowPartListener
 {
   Q_OBJECT
 
 public:
 
   static const std::string VIEW_ID;
 
   void RenderWindowPartActivated(mitk::IRenderWindowPart* renderWindowPart) override;
   void RenderWindowPartDeactivated(mitk::IRenderWindowPart* renderWindowPart) override;
   void RenderWindowPartInputChanged(mitk::IRenderWindowPart* renderWindowPart) override;
 
 protected:
 
   void SetFocus() override {}
 
   void CreateQtPartControl(QWidget* parent) override;
 
 private Q_SLOTS:
 
   /**
   * @brief Called when the user changes the render window selection in the combo box.
   *
   * @param renderWindowId   The text inside the combo box.
   */
   void OnRenderWindowSelectionChanged(const QString& renderWindowId);
 
 private:
 
   void SetControlledRenderer();
 
   void RenderWindowChanged();
 
   QWidget* m_Parent;
   Ui::QmitkRenderWindowManagerControls m_Controls;
 
-  mitk::IRenderWindowPart* m_RenderWindowPart;
+  mitk::IRenderWindowPart* m_RenderWindowPart = nullptr;
 
   QmitkRenderWindowDataStorageInspector* m_RenderWindowInspector;
   QAbstractItemView* m_InspectorView;
   QmitkDataNodeContextMenu* m_DataNodeContextMenu;
 
   QItemSelectionModel* GetDataNodeSelectionModel() const override;
 };
 
 #endif // QMITKRENDERWINDOWMANAGERVIEW_H