The quantity DELTAr relating M(W), M(Z) and G(mu) is calculated within
the Minimal Supersymmetric Standard Model (MSSM) and compared to that
of the Standard Model (SM). Contributions to DELTAr from various sect
ors of the model are analyzed in detail. It is found that the upper bo
und on DELTAr in the MSSM, with the light Higgs boson mass M(h), is gi
ven by the SM result with the Higgs boson mass taken to be M(h).