But Benitez insists Kromkamp made the right move and has criticised Van Basten's decision to talk to the press about his views.
"I have seen the comments," said the Liverpool boss. "If you want to say something like this you should talk directly to the player, not to the press," said Benitez.
"If you want to control the career of the player, talk to him, not to the newspapers. In football now you expect to hear agents talk like this, but not people with no daily relationship with the player.
"It's not his business. We're talking about the future of a player and his family. I don't see how joining Liverpool can be negative. Kromkamp was not playing in Villarreal and we decided to make a good swap.
"He started for Liverpool last weekend and worked hard as a right winger. We used him because we need a solution and he showed he is a good player."