diff --git a/src/plugins/platforms/windows/accessible/qwindowsmsaaaccessible.h b/src/plugins/platforms/windows/accessible/qwindowsmsaaaccessible.h
index d7dda6b3e2..80ff78d477 100644
--- a/src/plugins/platforms/windows/accessible/qwindowsmsaaaccessible.h
+++ b/src/plugins/platforms/windows/accessible/qwindowsmsaaaccessible.h
@@ -92,6 +92,7 @@ class QWindowsMsaaAccessible : public
 public:
     QWindowsMsaaAccessible(QAccessibleInterface *a)
         : accessible(a)
+        , ref(0)
     {
     }