  General Relativity has so far passed almost all the ground-based and
solar-system experiments. Any reasonable extended gravity models should
consistently reduce to it at least in the weak field approximation. In this
work we derive the gravitational potential for the Palatini formulation of the
modified gravity of the L(R) type which admits a de Sitter vacuum solution. We
conclude that the Newtonian limit is always obtained in those class of models
and the deviations from General Relativity is very small for a slowly moving
source.
