Restore iCloud Drive shortcut?

I am a fairly recent émigré from Windows (and quite happy with the switch). I'm running Yosemite, so my Finder had an iCloud Drive shortcut in the Finder sidebar. I deleted that shortcut, but now I have decided that I would like to have it back.

Note that I don't have a problem getting to iCloud Drive in the Finder--I can do it from the Go menu. I simply want to restore the Finder sidebar shortcut, as a matter of convenience. I tried going to iCloud Drive in the Finder, then dragging the folder name from the title bar over to the sidebar, with no luck--the name in the title bar doesn't drag.

How do I restore the iCloud Drive shortcut in the Finder sidebar? Thanks.