diff --git a/plugins/dockers/animation/kis_zoom_button.h b/plugins/dockers/animation/kis_zoom_button.h
index 34aab3339c..2fd64f6e68 100644
--- a/plugins/dockers/animation/kis_zoom_button.h
+++ b/plugins/dockers/animation/kis_zoom_button.h
@@ -1,51 +1,51 @@
 /*
  *  Copyright (c) 2016 Jouni Pentikäinen <joupent@gmail.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 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.
  */
 
 #ifndef _KIS_ZOOM_BUTTON_H
 #define _KIS_ZOOM_BUTTON_H
 
 #include "kis_draggable_tool_button.h"
 
 class KisZoomButton : public KisDraggableToolButton
 {
     Q_OBJECT
 public:
     KisZoomButton(QWidget *parent);
     ~KisZoomButton() override;
 
     qreal zoomLevel() const;
     void setZoomLevel(qreal level);
 
     void beginZoom(QPoint mousePos, qreal staticPoint);
     void continueZoom(QPoint mousePos);
 
     void mousePressEvent(QMouseEvent *e) override;
 
 Q_SIGNALS:
     void zoomStarted(qreal staticPoint);
     void zoomLevelChanged(qreal level);
 
 private Q_SLOTS:
     void slotValueChanged(int value);
 
 private:
-    qreal m_zoomLevel;
-    qreal m_initialDragZoomLevel;
+    qreal m_zoomLevel {1.0};
+    qreal m_initialDragZoomLevel {1.0};
 };
 
 #endif