Ember.js each-in helper not found

I'm using Ember.js 1.13.10

I get an Assertion Error helper 'each-in' could not be found

I searched the code in my bower component and indeed the each-in helper is not in the codebase

I don't understand why it is not there, it is in both the 1.13 and 2.0 guides and as far as I know ember 1.13 is identical to 2.0 minus the depreciations. each-in is a new feature which I can see on the github repo.