If someone forgets the qunut in Fajr, what should he do?

Hasan says that if a person forgets the Qunoot supplication in the Fajr prayer, then two prostrations of forgetfulness are obligatory upon him.

Hazrat Ibn Abi Laila was asked: If a person made a mistake (sahw) and then recited the Du'a Qunoot, what should he do? He replied: He had made a mistake, but now he has corrected it.

Hazrat Ata says that whoever held the opinion of reciting Qunoot and did not recite Qunoot, two prostrations of forgetfulness (sajda sahw) are obligatory upon him.