EmberFire Query equalTo 'false'

I'm using Ember 2.3, EmberData 2.3.2, and EmberFire 1.6.3

In my Ember route I'm returning a firebase query that looks like this:

  model() {
    return this.store.query('todo', {
      orderBy: 'complete',
      equalTo: false
    });
  },

my model looks like this:

export default DS.Model.extend({
  title: DS.attr('string'),
  complete: DS.attr('boolean')
});

When I query EmberFire with an equalTo: true I get back the expected results returning only items that are completed. If I query with an equalTo: false, it gives me all the records.

Is there a more appropriate way to fetch all the records where complete === false?