diff --git a/src/Gui/QSint/actionpanel/actionbox.h b/src/Gui/QSint/actionpanel/actionbox.h
index 3692d9938a..7c5a32cd57 100644
--- a/src/Gui/QSint/actionpanel/actionbox.h
+++ b/src/Gui/QSint/actionpanel/actionbox.h
@@ -242,7 +242,7 @@ public:
       */
     void addWidget(QWidget * w, QLayout * l = nullptr);
 
-    virtual QSize minimumSizeHint() const;
+    QSize minimumSizeHint() const override;
 
 protected:
     void init();
diff --git a/src/Gui/QSint/actionpanel/actiongroup.h b/src/Gui/QSint/actionpanel/actiongroup.h
index b8a87dc8d6..479fe18477 100644
--- a/src/Gui/QSint/actionpanel/actiongroup.h
+++ b/src/Gui/QSint/actionpanel/actiongroup.h
@@ -121,7 +121,7 @@ public:
       */
     QString headerText() const;
 
-    QSize minimumSizeHint() const;
+    QSize minimumSizeHint() const override;
 
 public Q_SLOTS:
     /** Expands/collapses the group.
@@ -155,7 +155,7 @@ protected Q_SLOTS:
 protected:
     void init(bool header);
 
-    virtual void paintEvent ( QPaintEvent * event );
+    void paintEvent ( QPaintEvent * event ) override;
 
     double m_foldStep, m_foldDelta, m_fullHeight, m_tempHeight;
     int m_foldDirection;
diff --git a/src/Gui/QSint/actionpanel/actionlabel.h b/src/Gui/QSint/actionpanel/actionlabel.h
index f3bca6abb7..127738180c 100644
--- a/src/Gui/QSint/actionpanel/actionlabel.h
+++ b/src/Gui/QSint/actionpanel/actionlabel.h
@@ -81,8 +81,8 @@ public:
 
     virtual ~ActionLabel() {}
 
-    virtual QSize sizeHint() const;
-    virtual QSize minimumSizeHint() const;
+    QSize sizeHint() const override;
+    QSize minimumSizeHint() const override;
 
 protected:
     void init();
diff --git a/src/Gui/QSint/actionpanel/actionpanel.h b/src/Gui/QSint/actionpanel/actionpanel.h
index c563259895..7f029a58e6 100644
--- a/src/Gui/QSint/actionpanel/actionpanel.h
+++ b/src/Gui/QSint/actionpanel/actionpanel.h
@@ -89,7 +89,7 @@ public:
       */
     void setScheme(ActionPanelScheme *scheme);
 
-    virtual QSize minimumSizeHint() const;
+    QSize minimumSizeHint() const override;
 
 protected:
     //virtual void paintEvent ( QPaintEvent * event );
diff --git a/src/Gui/QSint/actionpanel/taskgroup_p.h b/src/Gui/QSint/actionpanel/taskgroup_p.h
index 16b71491c6..3833d4395b 100644
--- a/src/Gui/QSint/actionpanel/taskgroup_p.h
+++ b/src/Gui/QSint/actionpanel/taskgroup_p.h
@@ -40,9 +40,9 @@ public:
   QPixmap transparentRender();
 
 protected:
-  virtual void paintEvent ( QPaintEvent * event );
-  virtual void keyPressEvent ( QKeyEvent * event );
-  virtual void keyReleaseEvent ( QKeyEvent * event );
+  void paintEvent ( QPaintEvent * event ) override;
+  void keyPressEvent ( QKeyEvent * event ) override;
+  void keyReleaseEvent ( QKeyEvent * event ) override;
 
   ActionPanelScheme *myScheme;