This article responds to an article by Francis J. Beckwith that argued that the consistent application of generic liberal principles requires that same-sex marriage not be recognised in civil law. This response demonstrates that Beckwith's article contains a series of interpretative and substantive flaws that render his argument unsuccessful. These relate to a misinterpretation of core liberal principles and a sidestepping of the matter of undue bias against same-sex partners. In correcting these flaws I tentatively propose a Voltairean argument in (...) favour of same-sex civil marriage for those citizens with moral qualms about same-sex relationships derived from their reasonable comprehensive doctrine. (shrink)