diff --git a/src/gui/kernel/qwindow.cpp b/src/gui/kernel/qwindow.cpp
index 2a2a2c542f..f2dacda0f5 100644
--- a/src/gui/kernel/qwindow.cpp
+++ b/src/gui/kernel/qwindow.cpp
@@ -236,6 +236,12 @@ QWindow::~QWindow()
     d->isWindow = false;
 }
 
+QWindowPrivate::QWindowPrivate()
+    = default;
+
+QWindowPrivate::~QWindowPrivate()
+    = default;
+
 void QWindowPrivate::init(QScreen *targetScreen)
 {
     Q_Q(QWindow);
diff --git a/src/gui/kernel/qwindow_p.h b/src/gui/kernel/qwindow_p.h
index b2bd4be6a9..dafd09b1e2 100644
--- a/src/gui/kernel/qwindow_p.h
+++ b/src/gui/kernel/qwindow_p.h
@@ -73,6 +73,9 @@ public:
         WindowFrameExclusive
     };
 
+    QWindowPrivate();
+    ~QWindowPrivate() override;
+
     void init(QScreen *targetScreen = nullptr);
 
 #ifndef QT_NO_CURSOR