Index: head/emulators/virtualbox-ose/files/extrapatch-src_VBox_Frontends_VirtualBox_src_widgets_UIMiniToolBar.cpp
===================================================================
--- head/emulators/virtualbox-ose/files/extrapatch-src_VBox_Frontends_VirtualBox_src_widgets_UIMiniToolBar.cpp	(revision 438899)
+++ head/emulators/virtualbox-ose/files/extrapatch-src_VBox_Frontends_VirtualBox_src_widgets_UIMiniToolBar.cpp	(revision 438900)
@@ -1,40 +1,40 @@
---- src/VBox/Frontends/VirtualBox/src/widgets/UIMiniToolBar.cpp.orig	2017-04-18 09:53:23.000000000 +0000
-+++ src/VBox/Frontends/VirtualBox/src/widgets/UIMiniToolBar.cpp	2017-04-19 17:26:36.194563000 +0000
+--- src/VBox/Frontends/VirtualBox/src/widgets/UIMiniToolBar.cpp.orig	2017-04-18 09:53:23 UTC
++++ src/VBox/Frontends/VirtualBox/src/widgets/UIMiniToolBar.cpp
 @@ -29,7 +29,9 @@
  # include <QToolButton>
  # include <QStateMachine>
  # include <QPainter>
 -# include <QWindow>
 +# if QT_VERSION >= 0x050000
 +#  include <QWindow>
 +# endif
  # ifdef VBOX_WS_X11
  #  include <QWindowStateChangeEvent>
  # endif
 @@ -616,8 +618,10 @@ void UIMiniToolBar::sltShow()
  {
      LogRel2(("GUI: UIMiniToolBar::sltShow\n"));
  
 +#if QT_VERSION >= 0x050000
      /* Update transience: */
      sltAdjustTransience();
 +#endif
  
  #if defined(VBOX_WS_MAC)
  
 @@ -806,6 +810,7 @@ void UIMiniToolBar::sltAdjust()
  #endif
  }
  
 +#if QT_VERSION >= 0x050000
  void UIMiniToolBar::sltAdjustTransience()
  {
      // WORKAROUND:
 @@ -817,6 +822,7 @@ void UIMiniToolBar::sltAdjustTransience(
      /* Add the transience dependency: */
      windowHandle()->setTransientParent(m_pParent->windowHandle());
  }
 +#endif
  
  void UIMiniToolBar::prepare()
  {