How do I put the focus on the QuickFix window after automatically opening the QuickFix list?

I have the following in my .vimrc to automatically open/close the QuickFix window after running :make :

  augroup quickfix
    autocmd!
    autocmd QuickFixCmdPost [^l]* cwindow
    autocmd QuickFixCmdPost l*    lwindow
  augroup END

It works fine, but when the autocmd opens the QuickFix window, it does not put the focus on the window. Is there any way to automatically put the focus on the QuickFix window after the autocmd opens it?