Mapping Function Keys to Menuitem

Is it possible to map the function keys to an MenuItem in the Unity Editor? I tried the following, and it somewhat seemed to work. However, it causes the static method to be triggered when both the F5 and 5 keys are pressed.

[MenuItem("Test/Do Stuff _F5", true)]

My guess is that it's either not supported, or the syntax is different for the function keys.

Function keys are not supported to be mapped to.

Looks like this is now supported, works for me: