Jakub Skrzypski was arrested in August on suspicion of arranging an arms deal with the West Papua Liberation Army.
He's charged with a range of crimes, including a plot to overthrow the government. He faces up to 20 years in jail if convicted.
His trial was due to start on Monday, but proceedings were called off becuase the court failed to book a flight for Mr Skrzypski's translator.
It will resume on January the 8th.
