He denied reports, however, that the cost of the plan has increased, telling France Info radio that they were "completely far-fetched."
The remarks spawned from a report in the French daily La Tribune claiming that that the cost of the deal with the United Arab Emirates would climb to between $5.2 and $6.7 billion. Negotiations between France and the gulf emirate have been ongoing for more than a year.
They mark the first signs of a co-development initiative with a foreign partner and customer. They also pave the way for possible provision of the new F4 version model to the French air force and navy.
Still, citing an unnamed source close to the talks, the La Tribune daily said the client would "best pay only half (of the bill)," one source close to the talks told the newspaper. France's Ministry of Defense and aerospace giant involved in the project -- Dassault Aviation, Thales and Safran -- would foot the rest of the bill.
The project concerns the upgrading of 60 Rafale combat aircraft which the United Arab Emirates wants to replace its aging fleet of 60b Mirage fighters.
Morin told France Info radio that the project's cost was estimated at $2.47 billion.
The twin-engine fighter Rafale is considered Dassault's crown jewel in France's arms industry. Its manufacturer is bidding for lucrative deals in Brazil and India, making pitches also to Libya and Kuwait.
Even so, it has had problems in finding international buyers despite intense lobbying France's highest officials, including French President Nicolas Sarkozy.
Its closest potential buyer appears to be Brazil, which is vying to buy 36 jet fighters in a multibillion dollar tender that has drawn the interest of the world's biggest aerospace companies.
By some accounts, the contract for the initial 36 planes could rise to more than 120.
The deal is estimated to be worth between $4 and $7 billion, depending on details of the order to be agreed, defense experts have said.
The aircraft are expected to renew Brazil's aging fleet of combat aircraft. It has long been suggested that France's Rafale fighter stands as the preferred pick of the Latin American country.
Should the negotiations finalize with the United Arab Emirates, the joint development project with France is expected to take years.