diff --git a/widgets/chatwidgetview.cpp b/widgets/chatwidgetview.cpp
index f74b781e6..db2f7811a 100644
--- a/widgets/chatwidgetview.cpp
+++ b/widgets/chatwidgetview.cpp
@@ -219,7 +219,7 @@ void ChatWidgetView::paintEvent(QPaintEvent *event)
 
                     const QPixmap *image = lli.getPixmap();
 
-                    if (image != NULL) {
+                    if (image != nullptr) {
                         painter.drawPixmap(QRect(wordPart.getX(), wordPart.getY(),
                                                  wordPart.getWidth(), wordPart.getHeight()),
                                            *image);
diff --git a/widgets/chatwidgetview.h b/widgets/chatwidgetview.h
index 423e50671..4de6f1430 100644
--- a/widgets/chatwidgetview.h
+++ b/widgets/chatwidgetview.h
@@ -29,14 +29,14 @@ public:
     ScrollBar *getScrollbar();
 
 protected:
-    void resizeEvent(QResizeEvent *);
+    void resizeEvent(QResizeEvent *) override;
 
-    void paintEvent(QPaintEvent *);
-    void wheelEvent(QWheelEvent *event);
+    void paintEvent(QPaintEvent *) override;
+    void wheelEvent(QWheelEvent *event) override;
 
-    void mouseMoveEvent(QMouseEvent *event);
-    void mousePressEvent(QMouseEvent *event);
-    void mouseReleaseEvent(QMouseEvent *event);
+    void mouseMoveEvent(QMouseEvent *event) override;
+    void mousePressEvent(QMouseEvent *event) override;
+    void mouseReleaseEvent(QMouseEvent *event) override;
 
     bool tryGetMessageAt(QPoint p, std::shared_ptr<messages::MessageRef> &message,
                          QPoint &relativePos);