Tech giant Apple is reportedly being sued by two female employees who have accused the company of gender discrimination in pay.

According to reports, two women filed a proposed class-action lawsuit on Thursday in the San Francisco state court, which covers upwards of 12,000 current and former female employees in California.

The suit claims that Apple has been paying women less than their male counterparts for the same type of work. It also alleges bias against women in their performance review system, which would result in lower salaries.

The plaintiffs accuse Apple of breaching California’s Equal Pay Act, which requires “equal pay for employees who perform ‘substantially similar work,’ when viewed as a composite of skill, effort, and responsibility.”

In a statement obtained by Reuters, Apple defended its commitment to pay equity, regardless of gender.

“Every year we partner with an independent third-party expert to examine each team member’s total compensation and make adjustments, where necessary, to ensure that we maintain pay equity,” the company said.

The plaintiffs in the lawsuit are reportedly seeking an unspecified amount in damages and penalties.