diff --git a/src/ui/widgets/clickablelabel.hpp b/src/ui/widgets/clickablelabel.hpp
index 212d0570..155bcd35 100644
--- a/src/ui/widgets/clickablelabel.hpp
+++ b/src/ui/widgets/clickablelabel.hpp
@@ -38,7 +38,7 @@ class ClickableLabel : public QLabel
     ~ClickableLabel();
 
 protected:
-    void mousePressEvent(QMouseEvent* event);
+    void mousePressEvent(QMouseEvent* event) override;
 
 Q_SIGNALS:
     void clicked();
diff --git a/src/ui/widgets/colorbutton.hpp b/src/ui/widgets/colorbutton.hpp
index 7798975f..3321f9e2 100644
--- a/src/ui/widgets/colorbutton.hpp
+++ b/src/ui/widgets/colorbutton.hpp
@@ -44,7 +44,7 @@ class ColorButton : public QPushButton
 	QColor color_;
 
 private:
-	void paintEvent(QPaintEvent *event);
+	void paintEvent(QPaintEvent *event) override;
 
 public Q_SLOTS:
 	void change_color();
diff --git a/src/ui/widgets/plot/axispopup.hpp b/src/ui/widgets/plot/axispopup.hpp
index da096d4f..f4be7099 100644
--- a/src/ui/widgets/plot/axispopup.hpp
+++ b/src/ui/widgets/plot/axispopup.hpp
@@ -53,7 +53,7 @@ class AxisPopup : public widgets::Popup
 	QDialogButtonBox *button_box_;
 
 	void setup_ui();
-	void showEvent(QShowEvent *event);
+	void showEvent(QShowEvent *event) override;
 
 private Q_SLOTS:
 	void on_accept();