diff --git a/collects/tests/mzscheme/unitsig.ss b/collects/tests/mzscheme/unitsig.ss
index 3956e5c..708f785 100644
--- a/collects/tests/mzscheme/unitsig.ss
+++ b/collects/tests/mzscheme/unitsig.ss
@@ -478,7 +478,7 @@
 		     (import (define-values))
 		     (let () (define define-values 10) define-values)))
 
-;; Invoke-unit linking in let-baound variables
+;; Invoke-unit linking in let-bound variables
 (test '(the-x 10) 'invoke/sig 
       (let ([x 'the-x])
 	(invoke-unit/sig