diff --git a/parser-tools/private-lex/deriv.rkt b/parser-tools/private-lex/deriv.rkt
index 69fb846..151c75e 100644
--- a/parser-tools/private-lex/deriv.rkt
+++ b/parser-tools/private-lex/deriv.rkt
@@ -218,7 +218,7 @@
 ;;                    (list-of (cons int (list-of (cons char-set int)))))
 ;; Each transitions is a state and a list of chars with the state to transition to.
 ;; The finals and transitions are sorted by state number, and duplicate free.
-(struct dfa (num-states start-state final-states/actions transitions) #:inspector (make-inspector))
+(struct dfa (num-states start-state final-states/actions transitions) #:transparent)
   
 (define loc:get-integer is:get-integer)
   
diff --git a/parser-tools/private-lex/re.rkt b/parser-tools/private-lex/re.rkt
index 3221e4d..f8c7111 100644
--- a/parser-tools/private-lex/re.rkt
+++ b/parser-tools/private-lex/re.rkt
@@ -25,15 +25,15 @@
 ;;
 ;; Every re must have an index field globally different from all
 ;; other re index fields.
-(struct re (nullable? index) #:inspector (make-inspector))
-(struct epsilonR re () #:inspector (make-inspector))
-(struct zeroR re () #:inspector (make-inspector))
-(struct char-setR re (chars) #:inspector (make-inspector))
-(struct concatR re (re1 re2) #:inspector (make-inspector))
-(struct repeatR re (low high re) #:inspector (make-inspector))
-(struct orR re (res) #:inspector (make-inspector))
-(struct andR re (res) #:inspector (make-inspector))
-(struct negR re (re) #:inspector (make-inspector))
+(struct re (nullable? index) #:transparent)
+(struct epsilonR re () #:transparent)
+(struct zeroR re () #:transparent)
+(struct char-setR re (chars) #:transparent)
+(struct concatR re (re1 re2) #:transparent)
+(struct repeatR re (low high re) #:transparent)
+(struct orR re (res) #:transparent)
+(struct andR re (res) #:transparent)
+(struct negR re (re) #:transparent)
 
 ;; e : re
 ;; The unique epsilon re
diff --git a/parser-tools/private-lex/token.rkt b/parser-tools/private-lex/token.rkt
index 62ea457..571f073 100644
--- a/parser-tools/private-lex/token.rkt
+++ b/parser-tools/private-lex/token.rkt
@@ -15,7 +15,7 @@
 ;; A token is either
 ;; - symbol
 ;; - (token symbol any)
-(struct token (name value) #:inspector (make-inspector))
+(struct token (name value) #:transparent)
 
 ;; token-name*: token -> symbol
 (define (token-name* t)
diff --git a/parser-tools/private-yacc/grammar.rkt b/parser-tools/private-yacc/grammar.rkt
index 8364f2c..41ed445 100644
--- a/parser-tools/private-yacc/grammar.rkt
+++ b/parser-tools/private-yacc/grammar.rkt
@@ -7,21 +7,21 @@
          racket/contract)
   
 ;; Each production has a unique index 0 <= index <= number of productions
-(struct prod (lhs rhs index prec action) #:inspector (make-inspector) #:mutable)
+(struct prod (lhs rhs index prec action) #:mutable)
 
 ;; The dot-pos field is the index of the element in the rhs
 ;; of prod that the dot immediately precedes.
 ;; Thus 0 <= dot-pos <= (vector-length rhs).
-(struct item (prod dot-pos) #:inspector (make-inspector))
+(struct item (prod dot-pos) #:transparent)
   
 ;; gram-sym = (union term? non-term?)
 ;; Each term has a unique index 0 <= index < number of terms
 ;; Each non-term has a unique index 0 <= index < number of non-terms  
-(struct term (sym index prec) #:inspector (make-inspector) #:mutable)
-(struct non-term (sym index) #:inspector (make-inspector) #:mutable)
+(struct term (sym index prec) #:mutable)
+(struct non-term (sym index) #:mutable)
 
 ;; a precedence declaration.
-(struct prec (num assoc) #:inspector (make-inspector))
+(struct prec (num assoc) #:transparent)
   
 (provide/contract
  [item (prod? (or/c #f natural-number/c) . -> . item?)]
diff --git a/parser-tools/private-yacc/lr0.rkt b/parser-tools/private-yacc/lr0.rkt
index 80b7011..6a25256 100644
--- a/parser-tools/private-yacc/lr0.rkt
+++ b/parser-tools/private-yacc/lr0.rkt
@@ -14,8 +14,8 @@
 ;;   be used to compare kernels
 ;;   Each kernel is assigned a unique index, 0 <= index < number of states
 ;; trans-key = (trans-key kernel gram-sym)
-(struct kernel (items index) #:inspector (make-inspector))
-(struct trans-key (st gs) #:inspector (make-inspector))
+(struct kernel (items index) #:transparent)
+(struct trans-key (st gs) #:transparent)
 
 (define (trans-key<? a b)
   (define kia (kernel-index (trans-key-st a)))
@@ -290,7 +290,7 @@
        (enq! new-kernels (goto (car old-kernels)))
        (loop (cdr old-kernels) (cons (car old-kernels) seen-kernels))])))
 
-(struct q (f l) #:inspector (make-inspector) #:mutable)
+(struct q (f l) #:mutable)
 (define (empty-queue? q) (null? (q-f q)))
 (define (make-queue) (q null null))
 
diff --git a/parser-tools/private-yacc/parser-actions.rkt b/parser-tools/private-yacc/parser-actions.rkt
index 765305b..3becb52 100644
--- a/parser-tools/private-yacc/parser-actions.rkt
+++ b/parser-tools/private-yacc/parser-actions.rkt
@@ -12,12 +12,12 @@
 ;; A reduce contains a runtime-reduce so that sharing of the reduces can
 ;; be easily transferred to sharing of runtime-reduces.
   
-(struct action () #:inspector (make-inspector))
-(struct shift action (state) #:inspector (make-inspector))
-(struct reduce action (prod runtime-reduce) #:inspector (make-inspector))
-(struct accept action () #:inspector (make-inspector))
-(struct goto action (state) #:inspector (make-inspector))
-(struct no-action action () #:inspector (make-inspector))
+(struct action () #:transparent)
+(struct shift action (state) #:transparent)
+(struct reduce action (prod runtime-reduce) #:transparent)
+(struct accept action () #:transparent)
+(struct goto action (state) #:transparent)
+(struct no-action action () #:transparent)
   
 (define (reduce* p)
   (reduce p
diff --git a/parser-tools/yacc.rkt b/parser-tools/yacc.rkt
index 43136ce..ee59f44 100644
--- a/parser-tools/yacc.rkt
+++ b/parser-tools/yacc.rkt
@@ -205,7 +205,7 @@
 (define (extract-no-src-pos ip)
   (extract-helper ip #f #f))
   
-(struct stack-frame (state value start-pos end-pos) #:inspector (make-inspector))
+(struct stack-frame (state value start-pos end-pos) #:transparent)
   
 (define (make-empty-stack i) (list (stack-frame i #f #f #f)))