In a rare move, Jimmy Fallon is speaking up against Donald Trump.

The Tonight Show host has decided to donate an undisclosed amount of money to RAICES, a non-profit which provides free or low-cost legal services to immigrants, after Trump lashed out at Fallon for criticizing their 2016 Tonight Show interview last week. "In honor of the President's tweet I'll be making a donation to RAICES in his name," Fallon tweeted on Sunday evening.

In an interview with the Hollywood Reporter, Fallon expressed regret for that 2016 segment with Trump in which he ruffled the then-Republican presidential candidate's hair. Following that incident, Fallon received a huge backlash from those who felt he had normalized Trump and his ratings slipped as a result. "I'm sorry if I made anyone mad. And, looking back, I would do it differently," Fallon told THR.

Trump didn't take kindly to that apology and hit up Twitter on Sunday to take a dig at Fallon. "@jimmyfallon is now whimpering to all that he did the famous 'hair show' with me (where he seriously messed up my hair), & that he would have now done it differently because it is said to have 'humanized' me-he is taking heat. He called & said 'monster ratings.' Be a man Jimmy!" Trump wrote. Trump has yet to respond to Fallon's vow to donate to RAICES.

Fallon has previously been accused of being too politically apathetic while his colleagues like Seth Meyers and Stephen Colbert remain vocal about the Trump administration's policies and scandals.

The Tonight Show Starring Jimmy Fallon airs weeknights at 11:35/10:35c on NBC.

Jimmy Fallon, <em>The Tonight Show Starring Jimmy Fallon</em>Jimmy Fallon, The Tonight Show Starring Jimmy Fallon