When attempting to run

wfdb.dl_database('ahadb', os.getcwd())

The following error is returned

Traceback (most recent call last):
File "", line 1, in
File "/wfdb/io/record.py", line 1365, in dl_database
r = requests.get(dburl)
NameError: global name 'dburl' is not defined

I made a quick fix by changing dburl to download.db_index_url
Which is the correct version?