WASHINGTON (AP) — President Donald Trump said Friday that war plans should not be shared with his adviser Elon Musk because of his business interests, a rare suggestion that the billionaire entrepreneur’s expansive role in the administration will face limits.

Trump made the comments during an Oval Office meeting on developing a new fighter jet, and he rejected reports that Musk would be briefed on how the United States would fight a hypothetical war with China.

“Elon has businesses in China,” the president said. “And he would be susceptible, perhaps, to that.”

Trump praised Musk as a patriot. However, the reference to his businesses — which include Tesla, an electric vehicle manufacturer trying to expand sales and production in China — is an unusual acknowledgment of concerns about Musk balancing his corporate and government responsibilities.

Trump had previously brushed off questions about Musk’s potential conflicts of interest, simply saying that Musk would steer clear when it was necessary.

The president said that Musk visited the Pentagon on Friday morning to discuss reducing costs, which he’s been working on through the Department of Government Efficiency.

Musk has played an integral role in the Trump administration’s push to dramatically reduce the size of the government. He’s faced intense blowback from some lawmakers and voters for his chain-saw-wielding approach to laying off workers and slashing programs, although Trump’s supporters have hailed it.

A senior defense official told reporters on Tuesday that roughly 50,000 to 60,000 civilian jobs will be cut in the Defense Department.