McDonald’s is fighting back against viral tweets and media reports that it says have exaggerated its price increases.

In a post on the company’s website Wednesday, McDonald’s U.S. President Joe Erlinger said reports suggesting the price of the average Big Mac has doubled since 2019 were false. McDonald’s said the average U.S. Big Mac was $4.39 in 2019 and now costs $5.29, a 20.5% increase.

Erlinger acknowledged that he and many franchisees were frustrated by a post on X last summer about a Big Mac meal in Connecticut that cost $18, calling the price “an exception.”

McDonald’s saw a marked slowdown in store traffic in the first three months of this year as inflation-weary customers in the U.S. and other big markets ate out less often.

“It’s clear that we — together with our franchisees — must remain laser-focused on value and affordability,” Erlinger said.