French Foreign Minister Bernard Kouchner has said the EU cannot change its Lisbon reform treaty to meet demands by Czech President Vaclav Klaus.

Mr Kouchner also accused Mr Klaus of ‘inventing difficulties’ for the treaty.

‘We are not going to change the Lisbon treaty, it has been approved by the Czech parliament and by the Czech senate in the precise terms in which everybody has accepted it, the 27 (EU) countries including that country,’ he said.

‘I have no doubt that President Klaus is going to invent many more difficulties, but I think that the Czech people accept that their representatives having voted, having said yes each time to this treaty precisely without changing one word, will influence him enough for it to finally be done,’ he added.

Mr Klaus raised a new obstacle to ratifying the treaty, telling current EU president Sweden he wanted a footnote added to the document before signing it.

Swedish Prime Minister Fredrik Reinfeldt said Mr Klaus had asked for a footnote of two sentences relating to the charter of fundamental rights.

There were no details of the wording.

Elsewhere, Poland's President Lech Kaczynski said he will sign the treaty Treaty on Saturday, ending his months-long holdout.

European Commission President Jose Manuel Barroso, European Parliament speaker Jerzy Buzek and Swedish Prime Minister Fredrik Reinfeldt, whose country holds the EU's rotating presidency, will attend the ceremony at the presidential palace.

Mr Kaczynski vowed to sign the treaty if Ireland approved it in a second referendum.