  We investigate the evolution of a binary system which initially has an
orbital period of 2^h 17^m and contains a 0.5 M_sun helium star with a white
dwarf companion of 0.97 M_sun, similarly to suggested SN Ia candidate
progenitor KPD 1930+2752. We show that the helium star completes core helium
burning and becomes a white dwarf before components merge. The most probable
outcome of the merger of components is formation of a massive white dwarf,
despite initially the total mass of the system is above the Chandrasekhar mass.
