  We discuss the moduli stabilization in a de Sitter compactification model
obtained coupling D-dimensional gravity to scalar and gauge fields. This class
of models is characterized by two moduli: one related to the volume of the
internal space, the other to the warp factor. While the volume modulus can be
fixed by appropriately tuning the gauge field strength, curvature of the
internal space, and cosmological constant, the same mechanism does not work for
the warp modulus. In this paper we discuss a stabilization mechanism based on
quantum effects and show that both moduli can be efficiently stabilized.
