Donald Trump might want to walk back a 2012 tweet implying only fat people drink Diet Coke after posting a photo of himself with a Diet Coke bottle on Thursday.

The billionaire mogul celebrated clinching the 1,237 delegates necessary to become the GOP nomination by posting a photo of himself to Instagram eating a McDonald’s Big Mac, fries and a Diet Coke with the caption, “Celebrating 1237! #Trump2016.”