Prince William and Kate Middleton recently embarked on the Royal Train tour, where they left a special message at Euston Station in London. However, it didn’t take long for fans to notice the royals’ small spelling error.

Earlier this week, the Duke and Duchess of Cambridge embarked on the unique trip honoring those who are working on the frontlines of the coronavirus pandemic. After chatting with transport workers about how they’ve adapted to social distancing, Middleton wrote a personal message on a service information board.

“Thank you to transport workers everywhere for keeping the coutry moving throughout this difficult year,” it read. “Wishing you all a very Merry Christmas!”