There is provided a smoking article having a mouth end and a distal end, the smoking article including a heat source positioned at the distal end; an aerosol-forming substrate adjacent to the heat source; and a cap configured to at least partially cover the heat source. The cap is attached at a line of weakness to the distal end, including a cylindrical plug of material circumscribed by a wrapper, and is removable to expose the heat source prior to use of the smoking article.