We examine the phrasal vs. clausal syntactic status of French infinitives. Whereas a number of current theories assume a VP-hypothesis (contra principles and parameters theories, including the Minimalist Program), data relative to causative constructions in French are often treated as clausal constructions (the so-called ‘proposition infinitive’). The aim of this paper is to demonstrate (i) that it is possible to account for causative constructions in French according to the VP-hypothesis (e.g. in the HPSG framework); (ii) that it is in fact impossible to maintain a clausal hypothesis for causative constructions with respect to subject inversion in French. We therefore argue in favour of the VP-hypothesis for all (French) infinitives.