1 files changed, 1 insertions, 1 deletions
diff --git a/6502.lisp b/6502.lisp
index 55a73cd..32d67ba 100644
--- a/6502.lisp
+++ b/6502.lisp
@@ -203,7 +203,7 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
    (BRK   0 (implied))))
 
 ;; Generated list of opcodes.
-(setf
+(defparameter
  *opcodes*
  (extract-keys *instructions*))