The governor of Central Bank of Nigeria, Godwin Emefiele said the apex bank will strive to protect the country’s currency reserves after a British court ruling granted a small natural gas firm the right to try to seize $9 billion in assets from federal government.

Such a sum would be one of the largest financial liabilities imposed on Nigeria in its history, representing 20% of the currency reserves of Africa’s largest economy and top oil producer.

The central bank governor said Nigeria had sufficient grounds to appeal the ruling, over an aborted gas project in the southern Nigerian city of Calabar, made on Friday in favour of Process and Industrial Developments Ltd.

“We know that the implication of that judgment has some impact on monetary policy, and that is why the central bank is going to step forward and … defend the reserves,” Emefiele told reporters in Abuja.

Pressure has been building on the naira as oil prices drop and foreign investors lock in their profits on local bonds as yields have fallen from as high as 18% a year ago. As yields have fallen, foreign inflows have slowed, in turn leading to a shortage of dollars and hurting the naira.

In a further sign of pressure on the currency the president recently told the central bank to stop providing funding for food imports, his spokesman said.

However Emefiele did not say what other measures the central bank might take to defend the country’s currency or its foreign exchange reserves.