If I edited Wikipedia I would add his name to the songwriting credits.
However, I should mention that one time I read an article that pointed out many examples of how All Music was frequently full of shit.
You can do that. He was one of the people who actually started the band way, way back when before they were BOC (and, indeed, before they were Soft White Underbelly) and of course, Wikipedia is edited by people who frequently have an axe to grind, or are cracked out of their melons, so what is a person to do?