Help -> About menu dissapears on Mac

Hi. I have a QMainWindow with QMenu. The project/app name is "macmenu". In the menu I have Help -> About (connected to slotAbout()), and Help -> About Qt (connected to slotAboutQt()). It works fine on Windows. When I click Help -> About, I see a QMessageBox displaying "About this app". When I click Help -> About Qt, I see a QMessageBox::aboutQt().

However on OS X 10.10 Qt reorganizes menu. Under the application menu macmenu now I see a single About item, however it doesn't execute slotAbout(), but slotAboutQt() and displays a Qt standard dialog with Qt version and description. I was not able to find my About window anywhere in the menu.

The project is attached.