Tiny cursor on HIDPI monitor

Hey there, I just installed the ready-to-run binary of Ardour from the site. On my 2560x1440 monitor it scales fine, but the mouse cursor remains unscaled.
Is there a way to scale the cursor as well?

I’m running X11, if that matters.

If the mouse is also too small for your other programs, you can change the size in your desktop settings.

No, it’s just Ardour’s cursor.