  The Rubakov-Callan effect is reexamined by considering the gravitational
effects caused by the heavy monopole mass. Assuming that the Higgs vacuum
expectation value is as large as (or larger than) the Planck mass, we show that
the calculational scheme of Rubakov and Callan may be extended in the presence
of curved background field. It is argued that the density of the fermion
condensate around a magnetically charged black hole is modified in an intricate
way.
