Book author in book section?

Hello, I've got an entry that's the postface of a book, written by a different author than the main content of the book. However, it is not an edited book as such. So, what I am trying to do is get Mendeley to drop the (Ed.) after the book's author. This is what I get: Lazzarato, M. (1999). Postface. Gabriel Tarde : Un vitalisme politique. In G. Tarde (Ed.), Monadologie et sociologie (pp. 103–150). Paris: Empêcheurs de penser en rond. But Gabriel Tarde is not the editor of the book... Is there some solution? Thanks, Nicolas