The left-wing Socialist Party, one of the leaders of the No campaign in 2005 against the EU constitution, claiming that the dud EU charter had favoured the interests of businesses over citizens, has already endorsed the idea that another referendum should be called.
On Friday, MP Harry Van Bommel, the party's spokesman for EU affairs and the deputy chair of the parliament's standing committee on the same subject, said that if a treaty change is approved by the European Council, it will call for a referendum.
"We are very happy to have the support of the PVV in our push for a referendum," he told EUobserver, "and that they are willing to look into the issue as well."
Mr Van Bommel was keen to stress that his party's opposition to the treaty change was for different reasons to that of the PVV.
"They are more concerned that we not pay out to poorer countries whereas we are more worried that the proposed changes limit a nation's policy space in the social arena," he explained.