The approximately 800 service members whose military service was put in limbo by President Donald Trump’s decision to end the Deferred Action for Childhood Arrivals, or DACA, program will not be deported, Defense Secretary Jim Mattis said Thursday.

Congress has been at an impasse over DACA, which provides a protected status for some younger undocumented immigrants who were brought to the U.S. as children.

Mattis told reporters Thursday that he has finalized an agreement with Department of Homeland Security Secretary Kirstjen Nielsen to put the military’s ”Dreamers” in a protected status.