Error when removing a key and options is null

The docs state that options is an optional parameter. I would expect that the following 'options' combinations should work:

1) null
2) {}
3) object with cas, persist_to and/or replicate_to

The issue: passing 'options' as null returns the following error: TypeError: Cannot read property 'hashkey' of null

Example:

options = (options ? options : null);

bucket.remove(key, options, function (err, result)

);

If I replace the line above with the following, it works fine:

options = (options ? options : {});