diff --git a/fontland/fontland/struct.rkt b/fontland/fontland/struct.rkt
index 003057e2..b9670baa 100644
--- a/fontland/fontland/struct.rkt
+++ b/fontland/fontland/struct.rkt
@@ -3,7 +3,13 @@
 (provide (all-defined-out))
 
 (struct ttf-font (port decoded-tables src directory ft-face hb-font hb-buf crc get-head-table-proc)
-  #:transparent #:mutable)
+  #:mutable
+  #:property prop:custom-write
+  (λ (f p w?) (display
+               (format "<~a ~a>"
+                       (object-name f)
+                       (let-values ([(dir name _) (split-path (ttf-font-src f))])
+                         name)) p)))
 
 (define (ft-face this)
   (or (force (ttf-font-ft-face this)) (error 'ft-face-not-available)))
@@ -17,18 +23,23 @@
 (define (hb-buf this)
   (or (force (ttf-font-hb-buf this)) (error 'hp-buf-not-available)))
 
-(struct glyph (id codepoints font is-mark? is-ligature? metrics) #:transparent #:mutable)
+(struct glyph (id codepoints font is-mark? is-ligature? metrics) #:mutable
+  #:property prop:custom-write
+  (λ (g p w?) (display
+               (format "<~a ~a ~a>"
+                       (object-name g)
+                       (glyph-id g)
+                       (glyph-font g)) p)))
 
-(struct ttf-glyph glyph () #:transparent)
+(struct ttf-glyph glyph ())
 
 ; glyphs = list of glyph ids in the subset
 ; mapping = of glyph ids to indexes in glyphs
-(struct subset (font glyphs mapping) #:transparent #:mutable)
+(struct subset (font glyphs mapping) #:mutable)
 
-(struct cff-subset subset (cff strings charstrings gsubrs) #:transparent #:mutable)
+(struct cff-subset subset (cff strings charstrings gsubrs) #:mutable)
 
-(struct cff-glyph glyph (path _usedGsubrs _usedSubrs)
-  #:transparent #:mutable)
+(struct cff-glyph glyph (path _usedGsubrs _usedSubrs) #:mutable)
 
 (define (make-cff-glyph . args)
   (apply cff-glyph (append args (list #f (make-hash) (make-hash)))))