Reports from French Polynesia say the pro-independence Tavini Huiraatira Party led by Oscar Temaru has threatened to boycott the early general election called for late January.
The Tahitipresse news agency reports that the party is discussing the option although no decision has been made.
This comes only hours after the French senate approved a government plan to change the French Polynesian electoral system and have polls with in two rounds of voting.
A senior Tavini member, Myron Mataoa, has accused Paris of favouring Gaston Tong Sang who was the territory's president until he was voted out less than three months ago.
The French government has decided on the reforms despite strong opposition by the main parties in Tahiti which voted against the project in an assembly vote.