(1-butyl-3-methylimidazolium tetrafluoroborate). Despite finding a larger reduction in the contact angle for positively charged surfaces, the authors did not find the same asymmetric behaviour when calculating the solid/liquid surface tension. The disagreement with the Young equation was attributed to the large influence of the water molecular orientation in the direct vicinity of the contact line, which might be dominant when, as it is in their case, the applied surface charge density is very small. Our QM/MD simulations indicate however that, at higher surface charge density (although still experimentally relevant), the observed reduction of contact angle goes hand in hand with a reduction in surface tension as expected by the Young equation.