Facebook has hit back in a spat with Google over the company's decision to block the export of contact information from Gmail.
The social networking site has added a link which enables users to add their Gmail contacts to a PC and then upload them to Facebook.
Google stopped this transfer happening automatically and criticised Facebook in a statement to Reuters last week.
"We have decided to change our approach slightly to reflect the fact that users often aren't aware that once they have imported their contacts into sites like Facebook, they are effectively trapped," said Google.
Following Facebook's decision to offer users a work-around solution, Google said it was disappointed in the site's actions, a spokesman told the BBC.
"We're disappointed that Facebook didn't invest their time in making it possible for their users to get their contacts out of Facebook," the company said. "As passionate believers that people should be able to control the data they create, we will continue to allow our users to export their Google contacts."
Facebook and Microsoft recently struck a deal allowing user data to power the Bing search engine.