In this article we tackle the issue of diachronic variation in constructional semantics through an exploration of the (recent) semantic history of the well-established English ditransitive or double object argument structure construction. Starting from the assumption that schematic syntactic patterns are not fundamentally different from lexical items, we will show that — similar to the diachronic semantic development of lexemes — the semantics of argument structure constructions in general and that of double object constructions in particular, is vulnerable to semasiological (...) shifts as well. More specifically, the analysis, which compares data from 18th-century Late Modern English with present-day English, shows that the double object construction's semantic evolution presents a case of specialization, in which the construction has come to be associated with a significantly narrower range of meanings. It will further be argued that such patterns of semantic change are best captured in a model of argument structure semantics which discriminates between central and lesscentral or prototypical and non-prototypical uses. (shrink)