Always space after a colon

When I implement a method (ctrl - i) that has parameters, the editor puts in a space after the colon. e.g.

def bla(first: Int) ...

I would like it to be:

def bla(first:Int) ...

I used to be able to do this in the Code Style | Spaces section of the settings but I can't find where it is now.

Am I missing something?

Thanks, Nick.