will having a joint checking account affect my individual mortgage application

I am applying for a first time mortgage under my name only, I have already been prequalified. I have very good credit and a savings account in my name only with enough funds for the down payment and losing costs. But I have a joint checking with my boyfriend and he has very bad credit. It is the same checking account that I have had for a very long time, but his name was added to it a couple of years ago when we moved in together. His paycheck is direct deposited into the account and we both have access to it, Will this be an issue when I actually apply for the mortgage? Should I take his name off the account, or will this cause a huge red flag? Thank you for any help you can provide!