Google VoiceGoogle on Wednesday announced that users who want to keep a previous Google Voice number permanently will now have the option — for a small fee.

The feature is not a major new offering, but it could help a select number of users who want or need two different Voice numbers. Any user who changed their Google Voice number, ported their number to Google Voice, or merged their number with Sprint used to lose the old Google Voice number after 90 days. Now users have the option to keep the old number as long as they pay a one-time $20 fee.

Any person who calls or texts a newly permanent secondary number will automatically forward to the newer Google Voice number. To keep a previous number, log in to Google Voice, click the Settings tab, and click “make permanent” next to the number you want to keep.

It’s hard to believe there are many users clamoring to keep their older, secondary Google Voice lines. However, it could come in handy if you want, for instance, a business number and a personal number through Google Voice. Or perhaps you want to keep a number that’s easier for people to remember and would rather give that out to friends and associates instead.