Members of the Office of Professional Employees International Union Local 2 have voted to go on strike against their employer, the D.C. headquarters of the Service Employees International Union, if it doesn’t stop outsourcing its work to non-union contractors. The workers have not actually hit the picket line so far.

Both sides are still trying to iron out their differences, said SEIU spokeswoman Sara Lonardo. “Everyone at SEIU values the work performed by our staff to improve the lives of SEIU members,” she told the Washington Examiner. “SEIU has been strongly committed to reaching a negotiated settlement that allows our union to meet the daunting challenges that SEIU members are up against and provides a workplace that is aligned with our values.”