How do you get the internal drive to show up when you're reinstalling?

Macbook Pro. Trying to reinstall Yosemite. I can get to the "Install OS X" page, but the only destination given is "Recovery HD". I can go to disk utilities and see that "Macintosh HD" is there, and I can hit the "Verify Disk" and "Repair Disk" options and those run through with no errors. The partition map shows one partition covering the entire disk (449.42G) with a Mac OS Extended (Journaled)" format.

How do I actually install to "Macintosh HD" though, if it doesn't show up as something you can install to?