*** qwindowswindow.cpp.orig	Wed Jan 18 10:21:58 2017
--- qwindowswindow.cpp	Tue May 30 16:00:22 2017
***************
*** 2168,2173 ****
--- 2168,2175 ----
  static inline bool applyNewCursor(const QWindow *w)
  {
      const QWindow *underMouse = QWindowsContext::instance()->windowUnderMouse();
+     if (!underMouse && w && w->isModal())
+         return true;
      if (underMouse == w)
          return true;
      for (const QWindow *p = underMouse; p ; p = p->parent()) {