One cement step has sunk

[Bill Rumbolz]

A 20 year old house as a 2 step front entrance, walk to cement step to cement porch. The cement step is in good shape but has settled several inches leaving a higher than normal step to the porch level. Would appreciate your suggestions on correcting this without removing the step and remaking it. Is there a metal tread which could be added? Would one layer of bricks on the step hold in place? Your suggestion appreciated.
Thank you for your opinion. Bill Rumbolz