Synthetic PoWR line profiles of Ne vii 2p ¹P^o− 2p ¹D, of the resonance doublets of O vi, N v, C iv, and of He iiλ 1640 Å calculated with mass-loss rates from Pauldrach et al. (1988, red lines) and 10 × and 100 × (K 1−27 and LoTr 4 only) enhanced mass-loss rates (blue, dashed and green, dotted lines, respectively), compared with the observations of the four O(He) stars.