Joint HELOC if only spouse is on deed?

[Lisa Kattenhorn]

My husband and I are looking to get into investment property and would like to take a HELOC out on our home to do so. I moved into the home he owned when we got married but my name is not on the deed. I have better credit and income, however, so we would like to take the HELOC out jointly to get a better rate. Can we take out a joint HELOC if only his name is on the deed to the house or do we have to go through the process of adding me first? Thanks in advance!