Default [Q] Chromecast screen mirroring with Cyanogenmod 11

I'm using Cyanogenmod 11 on my Verizon HTC one m7, and I can't get Chromecast mirroring to work via the update they released today. The cast screen option that's supposed to show up in the hamburger menu in the app isn't showing up. Is there something I need to do to get this to work, or will it just not work without stock software?