BlackBerry Curve 8300

Call me a late bloomer, but I just got my 1st PDA smartphone and love my new Curve. Question - is there a way to change the default when adding a received or previously called number to the address book. Currently, when asked if I want to add the number to the address book, it automatically get enters in the"work" field. Most folks I talk to are cell numbers - is there a way to change the default to add the number to "mobile" instead?