The mystery of IHOb is solved.

IHOP said on Monday that it’s temporarily changing its branding because the B stands for burgers.

It’s only a marketing campaign. IHOP isn’t changing its name. But the chain of breakfast diners took social media by storm last week with the cryptic announcement that it was flipping the lowercase “p” in its logo and making it a “b.”

IHOP, of course, stands for International House of Pancakes. But IHOP — sorry, IHOb — wants to be known as a place to get lunch and dinner, not just breakfast and brunch. It’s adding several burgers to its menu, including a Big Brunch burger with bacon, a fried egg and browned potato on top.