He said he would redeem the pledge in order to enhance the operations of the Task Force against Boko Haram.
A statement by his Special Adviser on Media and Publicity, Mr. Femi Adesina, quoted the President as speaking at a high-level meeting of the African Union Peace and Security Council.
Buhari said having already released $21m to the task force in June 2015, Nigeria would remit the balance of $79m very soon.
He also assured the Council that Boko Haram’s capacity to conduct conventional attacks has been “heavily degraded”.
He said, “As at now, there is no single Nigerian territory under the control of the insurgents other than their hideouts in Sambisa Forest.
The President also reaffirmed Nigeria’s readiness to support measures to end the conflicts in Burundi and South Sudan, including the proposed deployment of troops by the AU to Burundi.
“Without peace, there will be no development. It is therefore vital for all of us to join hands in taking appropriate measures to end the conflicts and bring a stop to the incalculable damage being inflicted on innocent citizens in the affected countries,” the President told participants at the meeting.