diff --git a/clx/dependent.lisp b/clx/dependent.lisp
index fd61272a9517cdcc53db9891ce416f146848aed5..c271b75b070d419204d6be959d1f0e061f643cde 100644
--- a/clx/dependent.lisp
+++ b/clx/dependent.lisp
@@ -2270,7 +2270,7 @@
 			       (symbol-package type))))
     (apply make-function slot-initializations)))
 
-#-(or ansi-common-lisp excl lcl3.0)
+#-(or ansi-common-lisp excl lcl3.0 CMU)
 (define-condition type-error (x-error)
   (datum
    expected-type)