Jimmy Kimmel on Thursday night fired back at President Donald Trump, who on Wednesday attacked the late night host and urged ABC to “get the bum off the air.”

“A special hello to those of you who are watching from the White House,” Kimmel said at the top of his show. “And you know who you are.”

Kimmel noted that Trump’s attack was posted at 12:49 a.m. Thursday, just 11 minutes after his show ended.

“He watches us live,” Kimmel gloated. “Hi, Mr. President. How are you? Thanks for watching us on TV instead of on YouTube. We appreciate that. And I’ll tell you: It’s viewers like you who keep us on the air, ironically.”

Kimmel, a frequent Trump target, said he’s lost count of how many times Trump has demanded that “Jimmy Kimmel Live!” be pulled off the air.