diff --git a/src/plugins/VerticalTabs/tabtreeview.cpp b/src/plugins/VerticalTabs/tabtreeview.cpp
index f06c98cc7..b7a58eb02 100644
--- a/src/plugins/VerticalTabs/tabtreeview.cpp
+++ b/src/plugins/VerticalTabs/tabtreeview.cpp
@@ -25,9 +25,8 @@
 
 #include <QToolTip>
 #include <QHoverEvent>
-#include <QApplication>
 
-TabTreeView::TabTreeView(QWidget* parent)
+TabTreeView::TabTreeView(QWidget *parent)
     : QTreeView(parent)
 {
     setDragEnabled(true);
diff --git a/src/plugins/VerticalTabs/tabtreeview.h b/src/plugins/VerticalTabs/tabtreeview.h
index e9a69cf08..186c8c30a 100644
--- a/src/plugins/VerticalTabs/tabtreeview.h
+++ b/src/plugins/VerticalTabs/tabtreeview.h
@@ -26,7 +26,7 @@ class TabTreeView : public QTreeView
     Q_OBJECT
 
 public:
-    explicit TabTreeView(QWidget *parent = 0);
+    explicit TabTreeView(QWidget *parent = nullptr);
 
     // In TabBar order
     bool areTabsInOrder() const;