Favored Enemy Question

[JumboWheat01]

So I've drawn up a plan for a standard tiefling ranger going with the Horizon Walker path, and I decided I wanted Devils and Demons as some of my favored enemies. Looking at my PHB (admittedly, it's an early printing,) all I see are Fiends (which I know Devils and Demons are a part of.) Is it just a one and done and I actually get favored enemy bonuses against both?

[Eragon123]

Is it just a one and done and I actually get favored enemy bonuses against both?

It is just a one and done. You get favored enemy bonuses against both types of fiends (and neutral fiends as well).