Enabling Short Tags in Elastic Beanstalk

I have been trying to upload a legacy app to an EB instance, but it keeps on failing. And I figured that PHP needs to support short tags in order for the application to run. With this, I thoroughly searched for any solution in the EB docs, and can't seem to find anything. Can someone point to a good direction?

I have been searching here: http://ift.tt/1epz6gc

Thanks