An anchor for securing a metal door frame to a floor comprises a generally planar flange securable in an upright position to an interior surface of the door frame, and a generally planar base extending generally orthogonally with respect to the flange and securable to the floor adjacent the door frame. The base comprises a central portion comprising an inner end adjacent the flange and an opposed outer end defining an outer edge. At least a first tab extends outwardly from the outer end of the central portion and beyond the outer edge.