  In the minimal supersymmetric standard model the decay $h^0 \to A^0A^0$ of
the light neutral scalar $h^0$ is kinematically allowed for low values of
$\tan\beta$ when radiative corrections to the neutral Higgs masses are taken
into account. The width of this decay mode is revisited on the basis of a
complete 1-loop diagrammatic calculation. We give the analytical expressions
and numerical results and compare them with the corresponding ones from the
simpler and compact approximations of the effective potential method and the
renormalization group approach.
