  Models endowed with Higgs portals can probe into the hidden sectors of
particle physics while providing stable dark matter candidates. Previous
tree-level computations in such scenarios have shown that experimental bounds
constrain dark matter to a very narrow region in parameter space. Aiming at
improving the study of the implications of those constraints, we inspect
one-loop corrections to the annihilation cross section for scalar dark matter
into observable fermions. We find that these loop contributions might be enough
to drastically change those results by deforming in about 10% the allowed
parameter space for dark matter particles with masses even below 1 TeV. These
findings encourage further investigation.
