Three Si iii absorption lines observed in MWC 314 (black solid lines) are overplotted with theoretical line profiles computed in non-LTE with Multi. The line transfer calculations use atmosphere models of T_eff = 17 kK (dashed drawn lines), 18 kK (solid drawn lines), and 19 kK (dash-dotted lines). Boldly drawn lines are computed with log g = 2.5, and thin drawn lines for log g = 3.0. Atmosphere models with T_eff > 19 kK yield Si iii line equivalent widths incompatible with observed values. The detailed profile fits require V_rotsini ≃ 50 km   s^-1.