Requiring file with some functions that need a param

I have an express application that i'm trying to put all my middleware in it's own file. Some of the middleware functions need the db object and some don't.
It's pretty straight forward for the functions that don't need the db object, but given my code structure below, how can I reference the db object in doesNotNeedDbParam since it already has params req, res, and next?
somefile.js

const router = express.Router()
const doesNotNeedDbParam = require('./middleware')().doesNotNeedDbParam

function foo () {
  // Currently I have to call require and pass in the db object here b/c it's
 not set when requiring the function doesNotNeedDbPara
  router.use(require('./middleware')(db).needsDbParam // <-- Is there a better 
way to do this so that I can require the file above and pass the db object in when it's set?
}

// Setup db object here
foo()

middleware.js

function doesNotNeedDbParam (req, res, next) {
  ...
}

function needsDbParam (req, res, next) {
  // Where do i reference the db variable?
}

module.exports = (db) => {
  return {
    doesNotNeedDbParam: doesNotNeedDbParam,
    needsDbParam: needsDbParam
  }
}

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