A shield panel includes a substantially flat plate adapted to be snugly fit into an opening defined in a casing of an electronic device for shielding a circuit board inside the casing. Two board support arms extend from the flat plate. Each board support arm defines an elongate slot extending in a direction substantially normal to the flat plate having a distal end, a proximal end, and two edges extending between the ends for receiving and guiding an edge of the circuit board from the distal end to the proximal end. One of the edges of the slot is declined with respect to the other edge for accommodating a variation of an angle formed between the flat plate and the circuit board.