Memo to Chelsea Handler: Morning ratings wars are no laughing matter.

The fork-tongued comic ruffled feathers in the NBC family with a recent dig at the TODAY show host Matt Lauer on her E! Show Chelsea Lately, causing bosses at Comcast (which owns both NBC and E!) to warn her not to rock the boat.

“Chelsea’s writers were warned to lay off Matt,” a source told the NY Post, “They don’t want them making more fun of Matt and the Ann Curry situation right now.”