diff --git a/wip-duuqnd/user-side-compiler/instruction.lisp b/wip-duuqnd/user-side-compiler/instruction.lisp
index f6b77cd..5555a49 100644
--- a/wip-duuqnd/user-side-compiler/instruction.lisp
+++ b/wip-duuqnd/user-side-compiler/instruction.lisp
@@ -56,6 +56,7 @@
 (defclass absolute-y-mixin (absolute-mixin) ())
 (defclass indirect-x-mixin (zero-page-mixin) ())
 (defclass indirect-y-mixin (zero-page-mixin) ())
+(defclass relative-mixin () ())
 
 (eval-when (:compile-toplevel :load-toplevel :execute)
   (defun addressing-mode-to-class-name (mode-keyword)