Meteor 1.6.1 use airbnb-js-shim breaking js Array.find by returning -1 instead of undefined

Hi, as explained in the title, i’m using Meteor 1.6.1 and the used lib ( airbnb-js-shim ) redefine the Array.find method … the effect is that in all the project, array.find will return -1 instead of undefined like it should do.

Do you know how could i solve that ? an upgrade of my meteor version should solve this or do i need to redefine myself the array.find prototype ?

thank you for your time