If the sugar switcheroo does happen, it wouldn’t affect Trump’s drink of choice, Diet Coke, which uses aspartame as a calorie-free beverage.

The ambiguity leaves it unclear whether Coca-Cola is actually planning to switch from high-fructose corn syrup—the sweetener currently used in most U.S. sodas—to cane sugar, which is more commonly used in international markets like Mexico and Europe.

The scrutiny over Coke’s sweeteners began Wednesday, when President Donald Trump announced that Atlanta-based Coca-Cola Co. had agreed to switch to using cane sugar in the regular version of its beverage manufactured in the U.S.