expt not in (scheme base)

[Diego A. Mundo via Chicken-users]

It looks like the expt procedure is not in scheme base:

#;1> (module test () (import (scheme  base)) (define four (expt 2 2)))

Errro: Module `test` has unresolved identifiers

  Unknown identifier `expt'

It seems like it should be there based on R7RS?

Diego