Customizing filename completion in Ex-mode

Is t开发者_StackOverflow社区here a way I can customize how vim does filename completion when I'm in ex-mode (on the : line)?

I never want to tab-complete to some filetypes (*.o, *.hi), and I'd rather they not pop up first.

Put the following in $MYVIMRC

set wildignore=*.o,*.hi