diff --git a/collects/parser-tools/lex.rkt b/collects/parser-tools/lex.rkt
index 2db2ecb..f495f10 100644
--- a/collects/parser-tools/lex.rkt
+++ b/collects/parser-tools/lex.rkt
@@ -189,14 +189,12 @@
                      (normalize-definition (syntax (define-syntax name-form body-form)) #'lambda)))
          
          #`(define-syntax #,name 
-             (let ((certifier (syntax-local-certifier))
-                   (func #,body))
+             (let ((func #,body))
                (unless (procedure? func)
                  (raise-syntax-error 'define-lex-trans "expected a procedure as the transformer, got ~e" func))
                (unless (procedure-arity-includes? func 1)
                  (raise-syntax-error 'define-lex-trans "expected a procedure that accepts 1 argument as the transformer, got ~e" func))
-               (make-lex-trans (lambda (stx)
-                                 (certifier (func stx) 'a)))))))
+               (make-lex-trans func)))))
       (_
        (raise-syntax-error
         #f
@@ -366,8 +364,8 @@
   (create-unicode-abbrevs #'here)
   
   (define-lex-trans (char-set stx)
-                    (syntax-case stx ()
-                      ((_ str)
+    (syntax-case stx ()
+      ((_ str)
        (string? (syntax-e (syntax str)))
        (with-syntax (((char ...) (string->list (syntax-e (syntax str)))))
          (syntax (union char ...))))))
diff --git a/collects/parser-tools/parser-tools.scrbl b/collects/parser-tools/parser-tools.scrbl
index d42bed3..9fe9922 100644
--- a/collects/parser-tools/parser-tools.scrbl
+++ b/collects/parser-tools/parser-tools.scrbl
@@ -331,6 +331,7 @@ characters, @racket[char-lower-case?] characters, etc.}
      _datum ...)] appears as a regular expression, it is replaced with
      the result of applying the transformer to the expression.}
 
+
 @; ----------------------------------------
 
 @subsection{Lexer SRE Operators}
diff --git a/collects/parser-tools/private-lex/stx.rkt b/collects/parser-tools/private-lex/stx.rkt
index 36976e3..37c6bc5 100644
--- a/collects/parser-tools/private-lex/stx.rkt
+++ b/collects/parser-tools/private-lex/stx.rkt
@@ -28,17 +28,20 @@
               ((char-range-arg #'#\1 #'here) (char->integer #\1))
               ((char-range-arg #'"1" #'here) (char->integer #\1)))
   
-  
+  (define orig-insp (current-code-inspector))
+  (define (disarm stx)
+    (syntax-disarm stx orig-insp))
+
   ;; parse : syntax-object (box (list-of syntax-object)) -> s-re (see re.ss)
   ;; checks for errors and generates the plain s-exp form for s
   ;; Expands lex-abbrevs and applies lex-trans.
   (define (parse stx disappeared-uses)
     (let ((parse
            (lambda (s)
-             (parse (syntax-recertify s stx (current-inspector) 'a) 
+             (parse (syntax-rearm s stx)
                     disappeared-uses))))
-    (syntax-case stx (repetition union intersection complement concatenation
-                      char-range char-complement)
+    (syntax-case (disarm stx) (repetition union intersection complement concatenation
+                                          char-range char-complement)
       (_
        (identifier? stx)
        (let ((expansion (syntax-local-value stx (lambda () #f))))
@@ -112,13 +115,11 @@
        ((op form ...)
         (identifier? (syntax op))
         (let* ((o (syntax op))
-               (expansion (syntax-local-value 
-                           (syntax-recertify o stx (current-inspector) 'a) 
-                           (lambda () #f))))
+               (expansion (syntax-local-value o (lambda () #f))))
           (set-box! disappeared-uses (cons o (unbox disappeared-uses)))
           (cond
             ((lex-trans? expansion)
-             (parse ((lex-trans-f expansion) stx)))
+             (parse ((lex-trans-f expansion) (disarm stx))))
             (expansion
              (raise-syntax-error 'regular-expression
                                  "not a lex-trans"