An American Airlines passenger sparked a huge debate earlier this week after she filmed the passenger behind her aggressively punching the back of her seat because she reclined.

Now Delta CEO Ed Bastian has joined in the discussion, stating that passengers should ask the person seated behind them if it’s okay to recline before doing so.

In a sit down with CNBC’s Squawk Box Bastian says, “I think customers have the right to recline. We’ve been testing “Reduce Recline [seats]” and seeing responses on that. But I think the proper thing to do is if you’re going to recline into somebody, that you ask if it’s okay first and then you do it.”

Bastian goes on to clarify that he is referring to those that know a tall passenger is seated behind them.

“If someone knows there is a tall person behind them and they want to recline their seat, I think the polite thing would be to make certain it was okay. I never recline because I don’t think that, as the CEO of the airline, I should be reclining my seat, and I never say anything to someone who reclines into me.”