emberjs - Add actions to Ember.Service

I'm trying to add actions to an Ember.Service in Ember 1.10 but I've had to alias _actions to the actions hash to get it working, am I missing something?

export default Ember.Service.extend(Ember.ActionHandler, {
  actions:{
    addItem: function(label) {
      console.log(label);
    }
  },

  setup: Ember.on('init', function(){
    this._actions = this.actions;
  })
});

Looking at the ember source, the triggerEvent method queries the _actions hash:

if (handler._actions && handler._actions[name]) {
  if (handler._actions[name].apply(handler, args) === true) {
    eventWasHandled = true;
  } else {
    return;
  }
}

I think I am missing something.