diff --git a/src/widgets/dialogs/qfiledialog.cpp b/src/widgets/dialogs/qfiledialog.cpp
index 8e29609395f..2ee09c36559 100644
--- a/src/widgets/dialogs/qfiledialog.cpp
+++ b/src/widgets/dialogs/qfiledialog.cpp
@@ -4069,10 +4069,6 @@ void QFileDialogComboBox::paintEvent(QPaintEvent *)
     painter.drawControl(QStyle::CE_ComboBoxLabel, opt);
 }
 
-QFileDialogListView::QFileDialogListView(QWidget *parent) : QListView(parent)
-{
-}
-
 void QFileDialogListView::setFileDialogPrivate(QFileDialogPrivate *d_pointer)
 {
     d_ptr = d_pointer;
@@ -4106,10 +4102,6 @@ void QFileDialogListView::keyPressEvent(QKeyEvent *e)
     e->accept();
 }
 
-QFileDialogTreeView::QFileDialogTreeView(QWidget *parent) : QTreeView(parent)
-{
-}
-
 void QFileDialogTreeView::setFileDialogPrivate(QFileDialogPrivate *d_pointer)
 {
     d_ptr = d_pointer;
diff --git a/src/widgets/dialogs/qfiledialog_p.h b/src/widgets/dialogs/qfiledialog_p.h
index 16b8b2f45b7..28750ca22cf 100644
--- a/src/widgets/dialogs/qfiledialog_p.h
+++ b/src/widgets/dialogs/qfiledialog_p.h
@@ -312,7 +312,8 @@ private:
 class QFileDialogComboBox : public QComboBox
 {
 public:
-    QFileDialogComboBox(QWidget *parent = nullptr) : QComboBox(parent), urlModel(nullptr) {}
+    QFileDialogComboBox(QWidget *parent = nullptr) :
+        QComboBox(parent), urlModel(nullptr), d_ptr(nullptr) {}
     void setFileDialogPrivate(QFileDialogPrivate *d_pointer);
     void showPopup() override;
     void setHistory(const QStringList &paths);
@@ -328,7 +329,7 @@ private:
 class QFileDialogListView : public QListView
 {
 public:
-    QFileDialogListView(QWidget *parent = nullptr);
+    QFileDialogListView(QWidget *parent = nullptr) : QListView(parent), d_ptr(nullptr) {}
     void setFileDialogPrivate(QFileDialogPrivate *d_pointer);
     QSize sizeHint() const override;
 protected:
@@ -340,7 +341,7 @@ private:
 class QFileDialogTreeView : public QTreeView
 {
 public:
-    QFileDialogTreeView(QWidget *parent);
+    QFileDialogTreeView(QWidget *parent) : QTreeView(parent), d_ptr(nullptr) {}
     void setFileDialogPrivate(QFileDialogPrivate *d_pointer);
     QSize sizeHint() const override;