  The predictions for the atmospheric neutrino flux at high energies strongly
depend on the contribution of prompt neutrinos, which are determined by the
production of charmed meson in the atmosphere at very forward rapidities. Here
we estimate the related cross sections taking into account the presence of an
intrinsic charm (IC) component in the proton wave function. The impact on the
predictions for the prompt neutrino flux is investigated assuming different
values for the probability to find the IC in the nucleon.
