In a series of experiments. Bock and colleagues have demonstrated that subjects show a reliable increase in the use of particular syntactic constructions after having heard and repeated that construction in an unrelated sentence. Aspects of the data seem to indicate that it is syntactic constituent structure, independent of meaning, that underlies the facilitation in these situations. In this study we investigate whether more semantic factors might also lead to priming, and specifically whether the assignment of a semantic role to a particular participant in a prime sentence can increase the probability of a target sentence whose structure allows a similar assignment. To test this we replicate Bock's study and include a further set of primes (provide-with primes) which have the syntactic constituent structure of the dative, but share semantic role assignment with the ditransitive. If syntactic priming were triggered by constituent structure alone, primes like this would lead to more dative responses, relative to a ditransitive prime. If semantic involvement were crucial, on the other hand, this prime should elicit more ditransitive responses. In this study we find significantly more ditransitive responses following the provide-with sentence than following a dative prime, and no difference between the provide-with and ditransitive primes, suggesting that semantic factors indeed play a role.