diff --git a/src/plugins/platforms/cocoa/qcocoawindow.h b/src/plugins/platforms/cocoa/qcocoawindow.h
index 7c1eec6e4a..ffbf9a2f48 100644
--- a/src/plugins/platforms/cocoa/qcocoawindow.h
+++ b/src/plugins/platforms/cocoa/qcocoawindow.h
@@ -218,32 +218,33 @@ public: // for QNSView
     static void setupPopupMonitor();
     static void removePopupMonitor();
 
-    NSView *m_view;
-    QCocoaNSWindow *m_nsWindow;
+    NSView *m_view = nil;
+    QCocoaNSWindow *m_nsWindow = nil;
 
-    Qt::WindowStates m_lastReportedWindowState;
-    Qt::WindowModality m_windowModality;
+    Qt::WindowStates m_lastReportedWindowState = Qt::WindowNoState;
+    Qt::WindowModality m_windowModality = Qt::NonModal;
 
     static QPointer<QCocoaWindow> s_windowUnderMouse;
 
-    bool m_initialized;
-    bool m_inSetVisible;
-    bool m_inSetGeometry;
-    bool m_inSetStyleMask;
-    QCocoaMenuBar *m_menubar;
+    bool m_initialized = false;
+    bool m_inSetVisible = false;
+    bool m_inSetGeometry = false;
+    bool m_inSetStyleMask = false;
 
-    bool m_frameStrutEventsEnabled;
+    QCocoaMenuBar *m_menubar = nullptr;
+
+    bool m_frameStrutEventsEnabled = false;
     QRect m_exposedRect;
     QRect m_normalGeometry;
-    int m_registerTouchCount;
-    bool m_resizableTransientParent;
+    int m_registerTouchCount = 0;
+    bool m_resizableTransientParent = false;
 
     static const int NoAlertRequest;
-    NSInteger m_alertRequest;
+    NSInteger m_alertRequest = NoAlertRequest;
 
-    bool m_drawContentBorderGradient;
-    int m_topContentBorderThickness;
-    int m_bottomContentBorderThickness;
+    bool m_drawContentBorderGradient = false;
+    int m_topContentBorderThickness = 0;
+    int m_bottomContentBorderThickness = 0;
 
     struct BorderRange {
         BorderRange(quintptr i, int u, int l) : identifier(i), upper(u), lower(l) { }
diff --git a/src/plugins/platforms/cocoa/qcocoawindow.mm b/src/plugins/platforms/cocoa/qcocoawindow.mm
index f7b3bcc6d7..423186295b 100644
--- a/src/plugins/platforms/cocoa/qcocoawindow.mm
+++ b/src/plugins/platforms/cocoa/qcocoawindow.mm
@@ -98,24 +98,7 @@ Q_CONSTRUCTOR_FUNCTION(qRegisterNotificationCallbacks)
 const int QCocoaWindow::NoAlertRequest = -1;
 QPointer<QCocoaWindow> QCocoaWindow::s_windowUnderMouse;
 
-QCocoaWindow::QCocoaWindow(QWindow *win, WId nativeHandle)
-    : QPlatformWindow(win)
-    , m_view(nil)
-    , m_nsWindow(nil)
-    , m_lastReportedWindowState(Qt::WindowNoState)
-    , m_windowModality(Qt::NonModal)
-    , m_initialized(false)
-    , m_inSetVisible(false)
-    , m_inSetGeometry(false)
-    , m_inSetStyleMask(false)
-    , m_menubar(nullptr)
-    , m_frameStrutEventsEnabled(false)
-    , m_registerTouchCount(0)
-    , m_resizableTransientParent(false)
-    , m_alertRequest(NoAlertRequest)
-    , m_drawContentBorderGradient(false)
-    , m_topContentBorderThickness(0)
-    , m_bottomContentBorderThickness(0)
+QCocoaWindow::QCocoaWindow(QWindow *win, WId nativeHandle) : QPlatformWindow(win)
 {
     qCDebug(lcQpaWindow) << "QCocoaWindow::QCocoaWindow" << window();