Invalid building hitbox for Rock Crusher

The rock crusher has clearly three (or excluding the wire) two tiles on either corner that shouldn't really have a building hitbox.

Examples of a building like this with proper hitboxes:

 Power control station that allows buildings in either corner.

This is especially important in the case of the rock crusher, as the top left or right corners would be perfect to put a ceiling light for example, speeding up the work process.