"Dégo" was blockaded in Valletta harbour during the Siege of Malta by the British, and was used as a prison hulk in Valletta harbour, being steadily stripped for firewood. She was eventually captured when the island surrendered on 4 September 1800, but the British considered her too worn out to take into service. She probably continued in use as a prison hulk, until she was sold for breaking up in 1803.