  We derive analytic formulas for the radiatively corrected mass of the scalar
Higgs boson in the framework of the minimal supersymmetric standard model
(MSSM). Since the scalar-top-quark mass in our analysis include terms
proportional to the gauge couplings in the 1-loop effective potential, the
radiatively corrected mass of the scalar Higgs boson partially contains the
gauge boson contributions. At the 1-loop level, the upper bound on the lighter
scalar Higgs boson mass can be increased about 20 GeV in favor of the partial
contributions of the gauge bosons. Thus the improved absolute upper bound on
the lighter scalar Higgs boson mass is about 150 GeV.
