diff --git a/collects/parser-tools/private-lex/error-tests.rkt b/collects/parser-tools/private-lex/error-tests.rkt
index 92307f8..0c97660 100644
--- a/collects/parser-tools/private-lex/error-tests.rkt
+++ b/collects/parser-tools/private-lex/error-tests.rkt
@@ -1,7 +1,7 @@
 #lang scheme/base
 (require (for-syntax scheme/base)
          "../lex.ss"
-         racunit)
+         rackunit)
 
 (define-syntax (catch-syn-error stx)
   (syntax-case stx ()