prodigy needs f.el

Got an error when loading prodigy

> File error: Cannot open load file, no such file or directory,  f

But this problem is solved after I require f manually.
Is f.el part of default installed package of emacs? 
If it's not, then prodigy.rcp needs a new depends.

P.S. Prodigy is a control panel for programs which execute in the background.
Thank you!