The MDG Target 8.D is the main debt-related target under MDG 8, containing a commitment to deal comprehensively with debt problems of developing countries and to make their debt sustainable in the long run. In addition, Target 8.B addressed the special needs of heavily indebted poor countries. To deal ‘comprehensively’ with the debt problems of developing countries requires not just considering debt relief for old debts that are deemed unsustainable, but that actions are also taken to prevent the build up of unsustainable debt in the future.