There is absolutely no problem listing your humanities degree on your CV/Resume. I also have an humanities undergraduate degree, as well as a masters in historical research; yet my field of work is in software development.
I personally choose to have my educational achievements prominently displayed on my CV. Consider it logically, even at the very least they show that you've been able to commit to a steady workload for a period of time and are capable of taking on the kind of pressures that you would expect from any kind of university degree.
Almost every employer in the field of development that I've interviewed with has asked me about my degrees, and why my career path has been so different. I like to use this opportunity to show them that the underlying skill-sets in the field of humanities can be re-applied quite adequately to development. This allows me to discuss things like, time management, careful assessment of facts, understanding the importance of briefs etc. Obviously I have a robust history of practical development thanks to previous years within the industry. That said, I think you should not undervalue your own achievements even if they are not related to the fields you apply to. They form a part of who you are as an employable individual. They can help demonstrate various traits that may be an ideal fit for the company you seek to work for.