The Ruling on Giving an Illegitimate Child in Marriage

Fatwa, posted 4.22.2010, from Canada, in:
Religious Authority: 
Abdul-Aziz ibn Baaz
Fatwa Question or Essay Title: 
A man married his daughter to another, then it became clear that the husband was an illegitimate child. What is the ruling on this situation?

If he [the husband] is a Muslim, then the marriage is correct, because there is nothing upon him of the sin of his mother and the man who committed adultery with her.