  We revive Witten's mechanism for the radiative seesaw induced neutrino masses
in SO(10) grand unified theory. We propose its extension to charged fermion
masses as a possible cure for wrong tree level mass relations. We offer two
simple realizations that can produce a realistic fermionic spectrum. The first
one requires two 10 dimensional Higgses in the Yukawa sector and utilizes
radiative effects for charged fermion masses. The second one trades one 10 for
a 120 dimensional Higgs and leads to the SO(10) theory with less parameters in
the Yukawa sector. The mechanism works only if supersymmetry is broken at the
GUT scale while gauginos and higgsinos remain at TeV. This provides a strong
rationale for the so called split supersymmetry.
