A federal judge ruled Thursday the Trump administration’s mass firing of probationary government workers was probably illegal, according to multiple outlets, ordering the Office of Personnel Management to rescind directives that triggered the layoffs after the Trump administration recently indicated the largest round of layoffs to several federal agencies yet is forthcoming.

The Office of Personnel Management has revised a Jan. 20 memo asking federal agencies to identify probationary employees ahead of a mass firing. The reissued memo does not order fired workers reinstated.