Calc: Styles menu on toolbar has tiny text

The dropdown menu for Styles on the toolbar has text so small that it’s unreadable.

Modifying the Default style to a larger font size increases the text size in the menu, but obviously this changes the sheet’s content as well.

Increasing the global UI scaling in LO is not a workable solution, as the rest of the interface is OK. It’s only this one menu that is too small.

Any suggestions?

Linux Mint 17