The man ousted as Papua New Guinea's acting prime minister says he will challenge the decision in court.
The country has a new prime minister after disgruntled government MPs joined forces with the Opposition to have the prime minister's office declared vacant.
MPs then voted to make former treasurer, Peter O'Neill, the replacement for ailing leader Sir Michael Somare.
The vote ousted Sam Abal, whom Sir Michael had appointed acting prime minister in his absence.
Mr Abal has vowed to take up the battle in the nation's courts and accused Speaker Jeffery Nape of hijacking parliamentary procedures to allow the vote.