MKO Abiola and Ambassador Babagana Kingibe were the candidates of Social Democratic Pary (SDP) that contested the election in 1993.
Buhari also tendered national apologies to all those who struggled for the actuallisation of the election, including journalists, politicians and all other stakeholders.
The President personally presented the awards to Mr Kola Abiola, son of MKO Abiola; Mrs Ganiat Fawehinmi, wife of late Chief Gani Fawehinmi; and Ambassador Babagana Kingigbe, who was the running mate to Abiola.
Buhari said as he presented the awards that the ceremony was not to open old wounds of inexplicable annulment of the election which was clear to have been won by MKO Abiola.
“We recognise that an error has been committed.
“We will no longer tolerate such perversion of justice.
“This honour if for the grievous injustice done to the country.
“It is meant to assist at healing the wounds and building national reconciliation of the 25 years of wounds caused by the annulment.
“I earnestly urge Nigerians to accept it in good faith and bury the past of June 12.
“We are celebrating June 12 as a democracy sustenance, freedom, unity and national cohesion.
“It will impact impact positively on the next generation.
“I tender the nation’s apology to the family of MKO Abiola, Also to those who struggle and stood for June 12.”
Buhari declared a minute silence in honour of the victims of June 12.
Mr Kola Abiola and his sister Hafsat Biola spoke on behalf of the family of MKO Abiola, saluting Buhari for the honour done to the gladiators of June 12 and for honouring their father.
Hafsat said “Today is important because in presents the unity of Nigeria.”
She appealed to all politicians to appreciate Nigerians,
“I urge all Nigerians to support President Buhari.