Scott Disick is not on Khloe Kardashian's list of approved visitors!

On Sunday's season premiere of Keeping Up with the Kardashians, Khloe, 26, freaks out when sister Kourtney, 31, invites beau Disick (via phone), 27, to check out Khloe's new pad.

"Scott's not coming over!" Khloe, snaps as the sisters lounge in bed with Kim and Mason, Kourtney's 8-month-old son with Disick.

"Why would I want someone like that in my house?" Khloe yells as Kourtney protests.

Indeed, an insider recently told Us Weekly that "there have been knock-down, drag-out fights between the girls over Scott," notorious for his hard partying and angry blowups.

The season premiere of Keeping Up with the Kardashians airs this Sunday on E! at 10 p.m.