The Turkish minister for European Union affairs has told the he is losing hope of getting a deal on visa-free travel for Turks within Europe.
Volkan Bozkir said changing anti-terror laws in Turkey would be impossible.
The EU insists that Turkey needs to narrow its definition of terrorism – as well as meet four other key criteria – to qualify for visa-free travel.
It is part of a larger agreement between the two sides aimed at easing Europe’s migration crisis.
On Wednesday, Mr Bozkir told the BBC that his hopes of getting visa-free travel for Turkish nationals were “getting less and less”.
He admitted that the negotiations had reached a crucial phase, stressing that Turkey had already done enough.
His comments came after a day of meetings with senior members of the European Parliament in Strasbourg.