diff --git a/3_25.rkt b/3_25.rkt
index db8b38f..79f6373 100644
--- a/3_25.rkt
+++ b/3_25.rkt
@@ -13,7 +13,7 @@
 (define (empty? table)
   (not (list? (cdr table))))
 
-(trace-define (lookup keys table)
+(define (lookup keys table)
   (cond ((null? keys) (cdr table))
         ((empty? table) false)
         (else
@@ -23,7 +23,7 @@
                false)))))
 
 (define (insert! keys value table)
-  (trace-define (insert-subtable! keys subtable)
+  (define (insert-subtable! keys subtable)
     (if (and (not (null? keys))
              (not (null? subtable)))
             (let* ((key (car keys))