Kruidvat, a Dutch drugstore chain, was forced to recall a color-by-the-letters book it had put on sale on Monday because it featured an image of Adolf Hitler.

The book in question, titled Kleuren op Code, included Hitler putting his hand up in a Nazi salute while also wearing a Swastika armband.

According to the NL Times, Trifora, the Belgian publishing company responsible for the book, released a statement pinning the “regrettable mistake” on book’s being produced in India.

“My suspicion is that the man who created the coloring book got a book of famous people out of the closet and selected a pair, which unfortunately included Adolf Hitler. Maybe he did not recognize him,” said a representative for the company in the statement. “It is a nasty combination of circumstances. We check the book on translations but do not check all the coloring pictures. We probably should’ve, but it did not happen.”

Other historical figures featured in the book include Abraham Lincoln, Albert Einstein, and Nelson Mandela.