  We consider a five dimensional AdS warped spacetime in presence of a massive
scalar field in the bulk. The scalar field potential fulfills the requirement
of modulus stabilization even when the effect of backreaction of the
stabilizing field is taken into account. In such a scenario, we investigate the
possible role of modulus field on a compact stellar structure from the
perspective of four dimensional effective theory. Our result reveals that in
the presence of the modulus field, the upper bound of mass-radius ratio
(generally known as Buchdahl's limit) of a star can go beyond the general
relativity prediction. Interestingly this provides a natural testbed for the
existence of such higher dimensional modulus field.
