diff --git a/doc/html/functions.html b/doc/html/functions.html
index 5de4c6fb..e5414421 100644
--- a/doc/html/functions.html
+++ b/doc/html/functions.html
@@ -65,7 +65,7 @@ $(function() {
 <div class="contents">
 <div class="textblock">Here is a list of all documented struct and union fields with links to the struct/union documentation for each field:</div><ul>
 <li>customFilter
-: <a class="el" href="structtjtransform.html#afd7fc262df33f741e120ef4183202ef5">tjtransform</a>
+: <a class="el" href="structtjtransform.html#a0dc7697d59a7abe48afc629e96cbc1d2">tjtransform</a>
 </li>
 <li>data
 : <a class="el" href="structtjtransform.html#a688fe8f1a8ecc12a538d9e561cf338e3">tjtransform</a>
diff --git a/doc/html/functions_vars.html b/doc/html/functions_vars.html
index 2b010f40..a77429bb 100644
--- a/doc/html/functions_vars.html
+++ b/doc/html/functions_vars.html
@@ -65,7 +65,7 @@ $(function() {
 <div class="contents">
 &#160;<ul>
 <li>customFilter
-: <a class="el" href="structtjtransform.html#afd7fc262df33f741e120ef4183202ef5">tjtransform</a>
+: <a class="el" href="structtjtransform.html#a0dc7697d59a7abe48afc629e96cbc1d2">tjtransform</a>
 </li>
 <li>data
 : <a class="el" href="structtjtransform.html#a688fe8f1a8ecc12a538d9e561cf338e3">tjtransform</a>
diff --git a/doc/html/search/all_0.js b/doc/html/search/all_0.js
index 54c73561..07cc58c7 100644
--- a/doc/html/search/all_0.js
+++ b/doc/html/search/all_0.js
@@ -1,4 +1,4 @@
 var searchData=
 [
-  ['customfilter_0',['customFilter',['../structtjtransform.html#afd7fc262df33f741e120ef4183202ef5',1,'tjtransform']]]
+  ['customfilter_0',['customFilter',['../structtjtransform.html#a0dc7697d59a7abe48afc629e96cbc1d2',1,'tjtransform']]]
 ];
diff --git a/doc/html/search/variables_0.js b/doc/html/search/variables_0.js
index 9ed036c1..e68263d9 100644
--- a/doc/html/search/variables_0.js
+++ b/doc/html/search/variables_0.js
@@ -1,4 +1,4 @@
 var searchData=
 [
-  ['customfilter_142',['customFilter',['../structtjtransform.html#afd7fc262df33f741e120ef4183202ef5',1,'tjtransform']]]
+  ['customfilter_142',['customFilter',['../structtjtransform.html#a0dc7697d59a7abe48afc629e96cbc1d2',1,'tjtransform']]]
 ];
diff --git a/doc/html/structtjtransform.html b/doc/html/structtjtransform.html
index 9ff248d4..c6fcb5bf 100644
--- a/doc/html/structtjtransform.html
+++ b/doc/html/structtjtransform.html
@@ -89,21 +89,21 @@ Data Fields</h2></td></tr>
 <tr class="memitem:a688fe8f1a8ecc12a538d9e561cf338e3"><td class="memItemLeft" align="right" valign="top">void *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structtjtransform.html#a688fe8f1a8ecc12a538d9e561cf338e3">data</a></td></tr>
 <tr class="memdesc:a688fe8f1a8ecc12a538d9e561cf338e3"><td class="mdescLeft">&#160;</td><td class="mdescRight">Arbitrary data that can be accessed within the body of the callback function.  <a href="structtjtransform.html#a688fe8f1a8ecc12a538d9e561cf338e3">More...</a><br /></td></tr>
 <tr class="separator:a688fe8f1a8ecc12a538d9e561cf338e3"><td class="memSeparator" colspan="2">&#160;</td></tr>
-<tr class="memitem:afd7fc262df33f741e120ef4183202ef5"><td class="memItemLeft" align="right" valign="top">int(*&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structtjtransform.html#afd7fc262df33f741e120ef4183202ef5">customFilter</a> )(short *coeffs, <a class="el" href="structtjregion.html">tjregion</a> arrayRegion, <a class="el" href="structtjregion.html">tjregion</a> planeRegion, int componentIndex, int transformIndex, struct <a class="el" href="structtjtransform.html">tjtransform</a> *transform)</td></tr>
-<tr class="memdesc:afd7fc262df33f741e120ef4183202ef5"><td class="mdescLeft">&#160;</td><td class="mdescRight">A callback function that can be used to modify the DCT coefficients after they are losslessly transformed but before they are transcoded to a new JPEG image.  <a href="structtjtransform.html#afd7fc262df33f741e120ef4183202ef5">More...</a><br /></td></tr>
-<tr class="separator:afd7fc262df33f741e120ef4183202ef5"><td class="memSeparator" colspan="2">&#160;</td></tr>
+<tr class="memitem:a0dc7697d59a7abe48afc629e96cbc1d2"><td class="memItemLeft" align="right" valign="top">int(*&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structtjtransform.html#a0dc7697d59a7abe48afc629e96cbc1d2">customFilter</a> )(short *coeffs, <a class="el" href="structtjregion.html">tjregion</a> arrayRegion, <a class="el" href="structtjregion.html">tjregion</a> planeRegion, int componentID, int transformID, struct <a class="el" href="structtjtransform.html">tjtransform</a> *transform)</td></tr>
+<tr class="memdesc:a0dc7697d59a7abe48afc629e96cbc1d2"><td class="mdescLeft">&#160;</td><td class="mdescRight">A callback function that can be used to modify the DCT coefficients after they are losslessly transformed but before they are transcoded to a new JPEG image.  <a href="structtjtransform.html#a0dc7697d59a7abe48afc629e96cbc1d2">More...</a><br /></td></tr>
+<tr class="separator:a0dc7697d59a7abe48afc629e96cbc1d2"><td class="memSeparator" colspan="2">&#160;</td></tr>
 </table>
 <a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
 <div class="textblock"><p>Lossless transform. </p>
 </div><h2 class="groupheader">Field Documentation</h2>
-<a id="afd7fc262df33f741e120ef4183202ef5"></a>
-<h2 class="memtitle"><span class="permalink"><a href="#afd7fc262df33f741e120ef4183202ef5">&#9670;&nbsp;</a></span>customFilter</h2>
+<a id="a0dc7697d59a7abe48afc629e96cbc1d2"></a>
+<h2 class="memtitle"><span class="permalink"><a href="#a0dc7697d59a7abe48afc629e96cbc1d2">&#9670;&nbsp;</a></span>customFilter</h2>
 
 <div class="memitem">
 <div class="memproto">
       <table class="memname">
         <tr>
-          <td class="memname">int(* tjtransform::customFilter) (short *coeffs, <a class="el" href="structtjregion.html">tjregion</a> arrayRegion, <a class="el" href="structtjregion.html">tjregion</a> planeRegion, int componentIndex, int transformIndex, struct <a class="el" href="structtjtransform.html">tjtransform</a> *transform)</td>
+          <td class="memname">int(* tjtransform::customFilter) (short *coeffs, <a class="el" href="structtjregion.html">tjregion</a> arrayRegion, <a class="el" href="structtjregion.html">tjregion</a> planeRegion, int componentID, int transformID, struct <a class="el" href="structtjtransform.html">tjtransform</a> *transform)</td>
         </tr>
       </table>
 </div><div class="memdoc">
diff --git a/turbojpeg.h b/turbojpeg.h
index 1f8756a6..c089f289 100644
--- a/turbojpeg.h
+++ b/turbojpeg.h
@@ -656,8 +656,8 @@ typedef struct tjtransform {
    * @return 0 if the callback was successful, or -1 if an error occurred.
    */
   int (*customFilter) (short *coeffs, tjregion arrayRegion,
-                       tjregion planeRegion, int componentIndex,
-                       int transformIndex, struct tjtransform *transform);
+                       tjregion planeRegion, int componentID, int transformID,
+                       struct tjtransform *transform);
 } tjtransform;
 
 /**