When Africa’s largest airline appears unwilling to accept a country’s currency, the problem usually extends far beyond aviation.

Ethiopian Airlines has come under criticism following reports that its Port Sudan office has stopped accepting Sudanese pounds for ticket purchases, requiring travellers to pay in U.S. dollars instead.

The reported move has sparked backlash among passengers and renewed concerns about the rapid deterioration of Sudan’s currency amid a war that has devastated the country’s economy.

The controversy is not really about airline tickets. It is about what happens when a currency weakens to the point where major businesses no longer want to hold it.

The pound’s collapse