Webpack with typescript external commonjs module

In order for my code below to work, I need to either repeat the require('./rolesService') clause in rolesView.ts , or uncomment the console.log statement. If I have neither of those lines, webpack does not include the referenced rolesService.ts in the bundle, resulting in a missing RolesServiceProvider error. I think I know why, since rs is not really used, except for type references that disappear once transpiled to es5, so webpack must be optimizing the import away. Is there a way to not have to repeat the require('./rolesService') twice.

rolesView.ts:

"use strict";

import angular = require('angular');

import rs = require('./rolesService');

require('./rolesService');

//console.log( rs);

class RolesViewController {
    static $inject = ['RolesService']
    constructor(private rolesService: rs.IRolesService) {
        rolesService.getRoles();
    }
}

angular.module('epsr').component('rolesView', {
    template: require('./rolesView.html'),
    controller: RolesViewController
});

rolesService.ts:

'use strict';

import angular = require('angular');

export interface IRole {
    id: string;
    name: string;
}

export interface IRolesService {
    getRoles(): ng.IPromise<IRole[]>;
}

class RolesService implements RolesService {
    static $inject = ['$http'];
    constructor(private $http: ng.IHttpService) {
    }

    getRoles(): ng.IPromise<IRole[]> {
        return this.$http.get('api/roles');
    }
}

angular.module('epsr').service('RolesService', RolesService);