diff --git a/unpacked/jax/output/CommonHTML/config.js b/unpacked/jax/output/CommonHTML/config.js
index 7fa1c2de6..35b78fe73 100644
--- a/unpacked/jax/output/CommonHTML/config.js
+++ b/unpacked/jax/output/CommonHTML/config.js
@@ -46,7 +46,9 @@ MathJax.OutputJax.CommonHTML = MathJax.OutputJax({
                          // use "container" to compute size from containing element,
                          // use "nn% container" for a portion of the container,
                          // use "nn%" for a portion of the window size
-    }
+    },
+    
+    undefinedFamily: "STIXGeneral,'Cambria Math','Arial Unicode MS',serif"
     
   }
 });
diff --git a/unpacked/jax/output/CommonHTML/fonts/TeX/fontdata.js b/unpacked/jax/output/CommonHTML/fonts/TeX/fontdata.js
index 5485122d4..c23fe670b 100644
--- a/unpacked/jax/output/CommonHTML/fonts/TeX/fontdata.js
+++ b/unpacked/jax/output/CommonHTML/fonts/TeX/fontdata.js
@@ -40,11 +40,19 @@
   var ARROWREP = [0x2212,MAIN,0,0,0,0,.1];   // add depth for arrow extender
   var DARROWREP = [0x3D,MAIN,0,0,0,0,.1];    // add depth for arrow extender
 
+  var UNDEFINEDFAMILY = CHTML.config.undefinedFamily;
+
+  MathJax.Hub.Insert(CHTML.config.styles,{
+    ".MJXc-TeX-unknown-R":  {"font-family":UNDEFINEDFAMILY, "font-style":"normal", "font-weight":"normal"},
+    ".MJXc-TeX-unknown-I":  {"font-family":UNDEFINEDFAMILY, "font-style":"italic", "font-weight":"normal"},
+    ".MJXc-TeX-unknown-B":  {"font-family":UNDEFINEDFAMILY, "font-style":"normal", "font-weight":"bold"},
+    ".MJXc-TeX-unknown-BI": {"font-family":UNDEFINEDFAMILY, "font-style":"italic", "font-weight":"bold"},
+  });
+
   CHTML.TEX = CHTML.TEXDEF;     // use default TeX paramaters
   CHTML.FONTDEF.TeX = {
     version: VERSION,
       
-    TeX_factor: 1,    // TeX em's to font em's
     baselineskip: 1.2,
     lineH: .8, lineD: .2,
       
diff --git a/unpacked/jax/output/CommonHTML/jax.js b/unpacked/jax/output/CommonHTML/jax.js
index 754823231..922e93ea8 100644
--- a/unpacked/jax/output/CommonHTML/jax.js
+++ b/unpacked/jax/output/CommonHTML/jax.js
@@ -38,8 +38,6 @@
       STRUTHEIGHT = 1,
       AFUZZ = .08, HFUZZ = .025, DFUZZ = .025;  // adjustments to bounding box of character boxes
 
-  var UNKNOWNFAMILY = "STIXGeneral,'Cambria Math','Arial Unicode MS',serif";
-
   var STYLES = {
     ".MathJax_CHTML_Display": {
       "display":    "block",
@@ -104,11 +102,6 @@
     ".MJXc-space2": {"margin-left":".222em"},
     ".MJXc-space3": {"margin-left":".278em"},
     
-    ".MJXc-TeX-unknown-R":  {"font-family":UNKNOWNFAMILY, "font-style":"normal", "font-weight":"normal"},
-    ".MJXc-TeX-unknown-I":  {"font-family":UNKNOWNFAMILY, "font-style":"italic", "font-weight":"normal"},
-    ".MJXc-TeX-unknown-B":  {"font-family":UNKNOWNFAMILY, "font-style":"normal", "font-weight":"bold"},
-    ".MJXc-TeX-unknown-BI": {"font-family":UNKNOWNFAMILY, "font-style":"italic","font-weight":"bold"},
-
     "mjx-chartest": {
       display:"block",
       position:"absolute", top:0,