diff --git a/src/plugins/platforms/cocoa/qcocoaintegration.h b/src/plugins/platforms/cocoa/qcocoaintegration.h
index dd0c4aedfe9..46e8925ba74 100644
--- a/src/plugins/platforms/cocoa/qcocoaintegration.h
+++ b/src/plugins/platforms/cocoa/qcocoaintegration.h
@@ -47,6 +47,7 @@
 #include "qcocoaautoreleasepool.h"
 #include "qcocoacursor.h"
 
+#include <QtCore/QScopedPointer>
 #include <QtGui/QPlatformIntegration>
 
 QT_BEGIN_NAMESPACE
@@ -90,11 +91,12 @@ public:
 
     QPlatformTheme *platformTheme() const;
 private:
-    QPlatformFontDatabase *mFontDb;
+
+    QScopedPointer<QPlatformFontDatabase> mFontDb;
     QAbstractEventDispatcher *mEventDispatcher;
 
-    QPlatformAccessibility *mAccessibility;
-    QPlatformTheme *mPlatformTheme;
+    QScopedPointer<QPlatformAccessibility> mAccessibility;
+    QScopedPointer<QPlatformTheme> mPlatformTheme;
 };
 
 QT_END_NAMESPACE
diff --git a/src/plugins/platforms/cocoa/qcocoaintegration.mm b/src/plugins/platforms/cocoa/qcocoaintegration.mm
index 7d91be776a0..685b640843b 100644
--- a/src/plugins/platforms/cocoa/qcocoaintegration.mm
+++ b/src/plugins/platforms/cocoa/qcocoaintegration.mm
@@ -89,6 +89,9 @@ QCocoaScreen::~QCocoaScreen()
 QCocoaIntegration::QCocoaIntegration()
     : mFontDb(new QCoreTextFontDatabase())
     , mEventDispatcher(new QCocoaEventDispatcher())
+    , mAccessibility(new QPlatformAccessibility)
+    , mPlatformTheme(new QCocoaTheme)
+
 {
     QCocoaAutoReleasePool pool;
 
@@ -134,13 +137,11 @@ QCocoaIntegration::QCocoaIntegration()
         screenAdded(screen);
     }
 
-    mAccessibility = new QPlatformAccessibility;
-    mPlatformTheme = new QCocoaTheme;
 }
 
 QCocoaIntegration::~QCocoaIntegration()
 {
-    delete mAccessibility;
+    [[NSApplication sharedApplication] setDelegate: 0];
 }
 
 bool QCocoaIntegration::hasCapability(QPlatformIntegration::Capability cap) const
@@ -177,7 +178,7 @@ QAbstractEventDispatcher *QCocoaIntegration::guiThreadEventDispatcher() const
 
 QPlatformFontDatabase *QCocoaIntegration::fontDatabase() const
 {
-    return mFontDb;
+    return mFontDb.data();
 }
 
 QPlatformNativeInterface *QCocoaIntegration::nativeInterface() const
@@ -187,12 +188,12 @@ QPlatformNativeInterface *QCocoaIntegration::nativeInterface() const
 
 QPlatformAccessibility *QCocoaIntegration::accessibility() const
 {
-    return mAccessibility;
+    return mAccessibility.data();
 }
 
 QPlatformTheme *QCocoaIntegration::platformTheme() const
 {
-    return mPlatformTheme;
+    return mPlatformTheme.data();
 }
 
 QT_END_NAMESPACE