When matching bone marrow tissue is blood type a factor?

Today I went to register to be on the National Bone Marrow Registry . We have a 16 year old girl with Leukemia in our town who has yet to find a match and there was a registration drive.

While at the drive a man who works construction and is not related to the drive told me I would not be a match because of my blood type. I have never heard of a marrow registry where they asked for a blood type so I am wondering if the man was correct and if a wrong blood type automatically excludes donors.

I registered and swabbed my mouth regardless of his statement but would like to know if he was right.