Cannot find EC2 service using nodejs aws-sdk

I am using Node.js with browserify and I have setup AWS like this:

var AWS = require('aws-sdk');
AWS.config.region = 'us-west-2b';

This works fine. An object is returned when I am printing to console.

However, when I do:

var ec2 = new AWS.EC2();
console.log(ec2);

It is failing to find EC2. I get undefined is not a function.

EC2 doesn't seem to exist. All the documentations direct me in this manner.