How to pass parameters to Node's Q library's (denodeify) promise handler

In the below code I would like to have variables a, b, c to be passed as parameter when processhttprequest() gets called.

    var q = require("q");
    var request = require('request');

    function myfun()
    {
        var a, b, c;
        //do some work here
        var httprequest = q.denodeify(request);
        var httprequestpromise = httprequest(httpoptions);
        httprequestpromise.then(processhttprequest);
    }

I tried httprequestpromise.then(processhttprequest.bind([a, b, c])); but no luck. Is this supported by Q, or any other promise library.