LinkedIn was fined $1.8 million for underpaying 686 female employees at its California offices between 2015 and 2017.

According to the U.S. Department of Labor, the fee is equal to back wages for the employees plus interest over time.

The DOL said LinkedIn’s payroll records between 2015 and 2017 showed that the company paid female workers less than male ones in the engineering and marketing department of its San Francisco office and headquarters in Sunnyvale, California.

“In addition to recovering $1.8 million in back wages and interest for these workers, our agreement will ensure that LinkedIn better understands its obligations as a federal contractor and complies in the future,” San Francisco’s OFCCP Director Jane Suhr.

Based on the conciliation agreement, the settlement showed that LinkedIn does not admit wrongdoing, but the platform agrees to analyze employee pay at its California offices and correct any payment difficulties. LinkedIn will also introduce a new training program for all managers involved in employee pay.