Prime Minister Haider al-Abadi said there were "only 24 hours left" of the 48 that Iraq gave Turkey to remove tanks and soldiers sent to a base near Mosul.
And Abadi visited the country's air force headquarters, saying: "We must be prepared and ready to defend Iraq and its sovereignty," according to his office.
"The air force has the capability... To protect Iraq and its borders from any threat it faces," the premier said.
A senior Turkish official said today that Ankara was unlikely to withdraw the forces, which number between 150 and 300 soldiers backed by 20 tanks, that were deployed to a base in the Bashiqa area, near IS's Iraqi hub Mosul.
Also Read
"We expect them to remain," the official said, though "it will depend on discussions."
Iraqi Foreign Minister Ibrahim al-Jaafari clarified today that the demand for the withdrawal applied only to the recent deployment and not to Turkish trainers, who have been working with forces in the country's north for some time.
"The advisers are another issue; there are advisers from a number of countries and we accepted the principle of advisers but not the principle of ground forces entering Iraqi territory," Jaafari said.
Turkish Prime Minister Ahmet Davutoglu has sought to downplay the recent deployment as "routine rotation activity" associated with the training effort, and as "reinforcement against security risks".
"This is not a new camp," but rather a pre-existing "training facility established to support local volunteer forces' fight against terrorism", Davutoglu said.