diff --git a/Final/3.rkt b/Final/3.rkt
index 5b1a48b..dd003f5 100644
--- a/Final/3.rkt
+++ b/Final/3.rkt
@@ -133,7 +133,7 @@
        (heap-set! thing 'forwarded)
        (heap-set! (+ thing 1) (gc:closure code-ptr free-vars)))]
     [else
-     (error 'forward/loc "Unknown tag: ~a" tag)]))
+     (error 'forward/loc "unknown tag: ~a" tag)]))
 
 
 (define (object-size addr)
@@ -146,7 +146,7 @@
        (+ 3 n-vars))]
     [(equal? tag 'forwarded) 2]
     [else
-     (error 'object-size "Unknown tag: ~a" tag)]))
+     (error 'object-size "unknown tag: ~a" tag)]))
 
 (define (gc! . other-roots)
   (swap-spaces!)