A feederhouse assembly for an agricultural harvester includes a frame, a header lock pin, a biasing member coupled to the frame and the header lock pin, and a latch coupled to the frame and the header lock pin. The biasing member is configured to urge the header lock pin outward to lock a harvesting header to the frame. A rotatable latch in a first positron protrudes from the frame and retains the header lock pin in an inward positron. The latch in a second position permits the header lock pin to travel outward. A method includes applying a force from a harvesting header on a latch protruding from a frame of a feederhouse, pushing the latch to release a header lock pin from an inward position, and urging the header lock pin outward to lock the harvesting header to the frame.