David Cameron has warned that the concept of human rights was being "distorted" - and even "discredited" - by controversial decisions in Europe.
He made the comments during a speech on 25 January 2012 to the Parliamentary Assembly of the Council of Europe in Strasbourg.
The UK currently holds the rotating presidency of the Council of Europe, and Mr Cameron promised to use the remaining months of its term to press for change.
The Council of Europe - which is not part of the European Union - has responsibility for the European Court of Human Rights.
The UK government is embroiled in a row with the court over voting rights for prisoners.
Britain's blanket ban on prisoners voting has been held incompatible with the European Convention on Human Rights but in 2011, MPs voted to keep it - although the vote was not binding. A new ruling is due on the case soon.