diff --git a/fontland/fontland/font.rkt b/fontland/fontland/font.rkt
index 02408966..3a327a98 100644
--- a/fontland/fontland/font.rkt
+++ b/fontland/fontland/font.rkt
@@ -49,7 +49,7 @@ https://github.com/mbutterick/fontkit/blob/master/src/TTFFont.js
 
 (define ft-library (delay (FT_Init_FreeType)))
 
-(define (+TTFFont _port [_decoded-tables (mhash)]
+(define (+ttf-font _port [_decoded-tables (mhash)]
                   [_src (path->string (object-name _port))]
                   [_directory (delay (decode Directory _port #:parent (mhash '_startOffset 0)))]
                   [_ft-face (delay (and _src (FT_New_Face (force ft-library) _src)))]
@@ -58,20 +58,20 @@ https://github.com/mbutterick/fontkit/blob/master/src/TTFFont.js
                   [_crc (begin0 (crc32c-input-port _port) (pos _port 0))]
                   [_get-head-table #f])
   (unless (input-port? _port)
-    (raise-argument-error '+TTFFont "input port" _port))
+    (raise-argument-error '+ttf-font "input port" _port))
   (unless (member (peek-bytes 4 0 _port) (list #"true" #"OTTO" (bytes 0 1 0 0)))
     (raise 'probe-fail))
   (define f
-    (TTFFont _port _decoded-tables _src _directory _ft-face _hb-font _hb-buf _crc _get-head-table))
+    (ttf-font _port _decoded-tables _src _directory _ft-face _hb-font _hb-buf _crc _get-head-table))
   
     ;; needed for `loca` table decoding cross-reference
-  (set-TTFFont-_get-head-table! f (λ () (get-head-table f)))
+  (set-ttf-font-get-head-table-proc! f (λ () (get-head-table f)))
   f)
 
 
 (define (directory this) (force (· this _directory)))
-(define (hb-font this) (or (force (TTFFont-_hb-font this)) (error 'hb-font-not-available)))
-(define (hb-buf this) (force (TTFFont-_hb-buf this)))
+(define (hb-font this) (or (force (ttf-font-hb-font this)) (error 'hb-font-not-available)))
+(define (hb-buf this) (force (ttf-font-hb-buf this)))
 
 (require "table-stream.rkt")
 
@@ -219,12 +219,12 @@ https://github.com/mbutterick/fontkit/blob/master/src/TTFFont.js
 
 
 ;; Returns a GlyphRun object, which includes an array of Glyphs and GlyphPositions for the given string.
-(define (layout this string [userFeatures #f] [script #f] [language #f] #:debug [debug #f])
+(define (layout this string [user-features #f] [script #f] [language #f] #:debug [debug #f])
   #;((string?) ((option/c (listof symbol?)) (option/c symbol?) (option/c symbol?)) . ->*m . GlyphRun?)
   (define (get-layout string)
     (define codepoints (map char->integer (string->list string)))
-    (define args (list codepoints (if userFeatures (sort userFeatures symbol<?) null) script language))
-    (define key (apply layout-cache-key (TTFFont-_crc this) args))
+    (define args (list codepoints (if user-features (sort user-features symbol<?) null) script language))
+    (define key (apply layout-cache-key (ttf-font-crc this) args))
     (hash-ref! layout-cache key
                (λ ()
                  #;(encode hb-output (apply harfbuzz-layout this args) #f)
@@ -289,7 +289,7 @@ https://github.com/mbutterick/fontkit/blob/master/src/index.js
 |#
 
 ;; Register font formats
-(define font-formats (list +TTFFont))
+(define font-formats (list +ttf-font))
 ;;fontkit.registerFormat(WOFFFont); ;; todo
 ;;fontkit.registerFormat(WOFF2Font); ;; todo
 ;;fontkit.registerFormat(TrueTypeCollection); ;; todo
diff --git a/fontland/fontland/struct.rkt b/fontland/fontland/struct.rkt
index e185ca70..60c19bf5 100644
--- a/fontland/fontland/struct.rkt
+++ b/fontland/fontland/struct.rkt
@@ -2,7 +2,7 @@
 
 (provide (all-defined-out))
 
-(struct TTFFont (_port _decoded-tables _src _directory _ft-face _hb-font _hb-buf _crc _get-head-table)
+(struct ttf-font (port decoded-tables src directory ft-face hb-font hb-buf crc get-head-table-proc)
   #:transparent #:mutable)
 
-(define (ft-face this) (or (force (TTFFont-_ft-face this)) (error 'ft-face-not-available)))
+(define (ft-face this) (or (force (ttf-font-ft-face this)) (error 'ft-face-not-available)))
diff --git a/fontland/fontland/table-stream.rkt b/fontland/fontland/table-stream.rkt
index d7bfb9f6..46c30c5d 100644
--- a/fontland/fontland/table-stream.rkt
+++ b/fontland/fontland/table-stream.rkt
@@ -17,7 +17,7 @@
 
 (define (has-table? this tag)
   #;((or/c bytes? symbol?) . ->m . boolean?)
-  (define directory (force (TTFFont-_directory this)))
+  (define directory (force (ttf-font-directory this)))
   (hash-has-key? (· directory tables) (match tag
                                              [(? bytes?) (string->symbol (bytes->string/latin-1 tag))]
                                              [_ tag])))
@@ -27,23 +27,23 @@
 (define (get-table this table-tag)
   (unless (has-table? this table-tag)
     (raise-argument-error 'get-table "table that exists in font" table-tag))
-  (hash-ref! (TTFFont-_decoded-tables this) table-tag (λ () (decode-table this table-tag))))
+  (hash-ref! (ttf-font-decoded-tables this) table-tag (λ () (decode-table this table-tag))))
 
 (define-table-getters)
 
 (define (get-table-stream this tag)
-  (define directory (force (TTFFont-_directory this)))
+  (define directory (force (ttf-font-directory this)))
   (define table (hash-ref (· directory tables) tag))
-  (and table (pos (TTFFont-_port this) (· table offset)) (TTFFont-_port this)))
+  (and table (pos (ttf-font-port this) (· table offset)) (ttf-font-port this)))
   
 (define  (decode-table this table-tag)
   (unless (hash-has-key? table-codecs table-tag)
     (raise-argument-error 'decode-table "decodable table" table-tag))
-  (define directory (force (TTFFont-_directory this)))
+  (define directory (force (ttf-font-directory this)))
   (define table (hash-ref (· directory tables) table-tag))
   ;; todo: possible to avoid copying the bytes here?
-  (pos (TTFFont-_port this) (· table offset))
-  (define table-bytes (open-input-bytes (peek-bytes (· table length) 0 (TTFFont-_port this))))
+  (pos (ttf-font-port this) (· table offset))
+  (define table-bytes (open-input-bytes (peek-bytes (· table length) 0 (ttf-font-port this))))
   (define table-decoder (hash-ref table-codecs table-tag))
   (decode table-decoder table-bytes #:parent this))
 
diff --git a/fontland/fontland/table/loca.rkt b/fontland/fontland/table/loca.rkt
index b7428a09..7ded01cd 100644
--- a/fontland/fontland/table/loca.rkt
+++ b/fontland/fontland/table/loca.rkt
@@ -45,7 +45,7 @@ https://github.com/mbutterick/fontkit/blob/master/src/tables/loca.js
 
 (define loca (+Rloca
               ;; todo: address ugliness to cross-ref head table from ttffont
-              (λ (o) (hash-ref (dump ((TTFFont-_get-head-table o))) 'indexToLocFormat)) 
+              (λ (o) (hash-ref (dump ((ttf-font-get-head-table-proc o))) 'indexToLocFormat)) 
               (dictify
                0 (dictify 'offsets (+Array uint16be))
                1 (dictify 'offsets (+Array uint32be)))))