Rocket Mortgage, the nation’s largest lender, has sued the U.S. Department of Housing and Urban Development, saying its reputation was sullied by a Justice Department lawsuit over appraisal bias, and that it should not have been included in the first place.

The lawsuit, filed Wednesday in U.S. District Court in Colorado, accuses HUD of heaping misplaced blame on Rocket Mortgage after a Black woman in Colorado accused a white appraiser of undervaluing her home.