Abstract: A mounting assembly (10) for the electromagnet (12) of an electromagnetic door locking system, the mounting assembly (10) comprising: a main body portion (14) affixable, in use, to a door frame (18), the main body portion (14) comprising at least two channels adapted to receive a corresponding set of tabs associated with the electromagnet (12) and a set of locking screws (30) cooperating with the channels and being adapted, upon tightening, to deform the channels to clamp the tabs to fix the electromagnet (12) relative to the main body portion (14).