How to make Swift constants available to ObjC

Using Swift
1

In a mixed ObjC + Swift app I have:

CommonStuff.swift
let someKey = "my Key"

I can use someKey in all my Swift files, but not in ObjC files.
How can I avoid doing:
NSString *someKey = @"my Key"; // duplicated from CommonStuff.swift

Gerriet.

2

You can't. You have to define such constants in ObjC.