  The next-to-leading order accuracy for MC@NLO results exclusive in J light
jets is achieved if the computation is based on matrix elements that feature J
and J+1 QCD partons. The simultaneous prediction of observables which are
exclusive in different light-jet multiplicities cannot simply be obtained by
summing the above results over the relevant range in J; rather, a suitable
merging procedure must be defined. We address the problem of such a merging,
and propose a solution that can be easily incorporated into existing MC@NLO
implementations. We use the automated aMC@NLO framework to illustrate how the
method works in practice, by considering the production at the 8 TeV LHC of a
Standard Model Higgs in association with up to J=2 jets, and of an e\nu_e pair
or a t\bar{t} pair in association with up to J=1 jet.
