President Donald Trump said he’s disappointed in Boeing Co., which said Tuesday that its 737 Max won’t be cleared to return to flight until mid-year, and praised Tesla Inc. chairman Elon Musk as “one of our great geniuses.”

“Very disappointing company,” Trump said of Boeing in an interview with CNBC in Davos, Switzerland on Wednesday, where he’s attending the World Economic Forum’s annual conference. “This is one of the great companies of the world, let’s say as of a year ago, and then all of a sudden things happen.”

In the same interview, he marveled at the success of Musk’s rocket company Space X — “he does good at rockets too, by the way. I never saw where the engines come down with no wings, no anything, and they’re landing.” He expressed surprise at Tesla’s resurgence since overcoming manufacturing difficulties with its Model 3 sedan last year.

“I was worried about him, because he’s one of our great geniuses, and we have to protect our genius,” Trump said. “You know, we have to protect Thomas Edison and we have to protect all of these people that — came up with originally the light bulb and — the wheel and all of these things.”