Hello, I found that c-write was producing code in a weird style with parentheses in odd places (yes it still works): -------------------------------------------------------------------------------------------- (cffi:defcunion (spnav-event :size 40) (type :int ) (motion (:struct spnav-event-motion) ) (button (:struct spnav-event-button) )) -------------------------------------------------------------------------------------------- instead of the more reasonable: -------------------------------------------------------------------------------------------- (cffi:defcunion (spnav-event :size 40) (type :int) (motion (:struct spnav-event-motion)) (button (:struct spnav-event-button))) -------------------------------------------------------------------------------------------- The attached patch makes some minor changes to the function c-write and adds the option of passing no-package to c-print-symbol down the call stack. Akshay