Hi, I have a generic function (defgeneric equals (a b &rest keys &key recursive key &allow-other-keys) ... ) This method works correctly: (defmethod equals ((a t) (b t) &rest keys) (declare (ignore keys)) (equalp a b)) ... ) But, this method throws an error: (defmethod equals ((a float) (b float) &rest keys &key floating-compare (max-relative-diff 1.19e-7)) ... ) My understanding from http://www.lispworks.com/documentation/HyperSpec/Body/07_fd.htm is that since &allow-other-keys has been set, this should work. As a point of reference, SBCL allows this, but of course that is not the determinant of correctness. :-) Best regards, Paul