Vanuatu's opposition leader says if this week's motion of no confidence in the government is successful, then he'll try and bring about changes to stop motions of no confidence.
Sato Kilman became the new prime minister last week after a motion successfully ousted the previous government of Joe Natuman, the 9th change in five years.
But less than 24 hours later, the new opposition leader, Edward Natapei, submitted his own motion in an attempt to oust Mr Kilman.
Mr Natapei says there are too many motions, and if he becomes part of the government this week, he will try to organise a referendum for a constitutional change.
"We in Vanuatu need to sit down and get our act together so that we put in a section in the constitution to ensure that there should be a limitation on the number of motions and limitations on members of parliament crossing the floor so that ensure that there is stability in the government and in the country."
Vanuatu's most recent opposition leader, Edward Natapei.