Mass-loss rate versus the classical Eddington parameter Γ_e, comparing our predictions with those of Gräfener & Hamann (2008). Our model predictions are indicated by coloured symbols connected with dashed lines. The best-fit relation from Eq (10) is shown as solid lines, while the fit from Gräfener & Hamann (2008) is shown as dotted lines. Absolute mass-loss rates predicted by the two fits for M_* = 60 M_⊙ and T_* = 38 kK are indicated by red and black star symbols, respectively.