Al Roker dressed up as Back to the Future character Doc Brown for Halloween on the Today show on Wednesday and some social media users are upset by his choice.

According to Page Six, users asked why it was OK for the weatherman to dress up as a White character following the controversy over his former colleague Megyn Kelly’s Blackface remarks.

“@alroker: @megynkelly is a terrible person to even suggest that it is Ok for a white person to go as a black character for Halloween. Also @alroker: Goes as Doc Brown, a White character from a movie for Halloween. #Hypocrites #Whiteface,” tweeted user @Mimi3202.

“I’m going to say this one last time, but the folks who get it, understand and the ones who DON’T, won’t. I can be Doc Brown, and I wear the outfit and wig and not change my skin color if you’re white,” he tweeted on Wednesday. “You can be President Obama if you want. Just don’t color your skin!”

NBC canceled Megyn Kelly Today last week after the host did a segment in which she did not understand why Blackface was racist.

“What is racist?” Kelly asked. “You do get in trouble if you are a White person who puts on blackface for Halloween, or a Black person who puts on whiteface for Halloween. Back when I was a kid, that was OK just as long as you were dressing as a character.”

Roker quickly condemned Kelly’s comment.

“The fact is, while she apologized to the (NBC) staff, she owes a bigger apology to folks of color around the country,” he said on Today. “This is a history going back to the 1830s minstrel shows to demean and denigrate a race. It wasn’t right.”