A tissue puncture closure device includes an anchor, a sealing plug, a compaction member, a suture, and a suture cutting member. The compaction member is configured to compress the sealing plug toward the anchor. The suture is coupled to the sealing plug and anchor, and a portion of the suture extends through at least a portion of the compaction member. The suture cutting member extends through an aperture in a sidewall of the compaction member and is operable to cut the suture at a location within the compaction member.