Indigenous rights have gained considerable prominence in international forums over the last few decades, and are now being institutionalised through emerging norms within the international system. This paper examines the factors affecting the adoption of the norm of self-determination for indigenous peoples in the Finnish case using current constructivist models of normative change. Explanations for Finland's difficulty in adopting this norm, as symbolised by the ratification process of International Labour Organization Convention No. 169, are found in both the international normative context in which it emerged and in domestic factors within Finland itself. The concept of a ‘corrupt’ norm is introduced as a theoretical device in cases where norms have strong moral- or value-based appeal, but are weak in terms of the clarity of how they will work. This is an INDIPO project paper (Tennberg 2006)