Date: Wed, 28 Feb 90 16:11 PST From: snicoud@atc.boeing.com (Stephen Nicoud) (do-external-symbols (sym :cl) (export sym :my-cl)) The bug here is that EXPORT takes either a symbol or a list of symbols. Guess what the value of (LISTP 'NIL) is? I think (EXPORT '(NIL) PACKAGE) will work.