Online classifieds marketplace Craigslist has added a feature that lets users specify that they accept cryptocurrency payments.

While the site’s users have been able to point out in the text of their posts that they may take bitcoin or another cryptocurrency, the website now allows users to more directly advertise by selecting a check-off box for “cryptocurrency ok.”

First pointed out on Reddit on Dec. 7, posts with that box ticked include a note, but leaves the details about the currency to the two parties.

As it stands, the feature appears to be relatively open-ended, leaving the cryptocurrency choice and the manner through which transactions are sent up to the buyer and seller.

It’s not entirely clear when the feature was added, through word of it began spreading on social media yesterday. Craigslist did not immediately respond to a request for comment.

Additionally, Craigslist users can also filter search results by whether a seller accepts cryptocurrency or not.

It’s a small but notable development for the long-running classifieds site, which was founded in 1995, boasts more than 80 million ads monthly (a figure that accounts for reposts and renewals). Per Alexa, Craigslist is the 16th most popular website in the U.S., ranking 106th globally.

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