diff --git a/unpacked/config/default.js b/unpacked/config/default.js
index e12f66e44..8a0a610b9 100644
--- a/unpacked/config/default.js
+++ b/unpacked/config/default.js
@@ -592,6 +592,14 @@ MathJax.Hub.Config({
     //
     fixphi: true,
     
+    //
+    //  Determines whether the MathML should be marked so that the HTML-CSS
+    //  and SVG output jax will use MathML spacing rules rather than TeX
+    //  spacing rules.  Since AsciiMath was designed for MathML output, the
+    //  MathML rules are used by default.
+    //
+    useMathMLspacing: true,
+    
     //
     //  Determines whether limits are placed above and below operators,
     //  or next to them.  (AsciiMath doesn't have separate in-line and
diff --git a/unpacked/jax/input/AsciiMath/config.js b/unpacked/jax/input/AsciiMath/config.js
index f02dff2aa..3e84f9220 100644
--- a/unpacked/jax/input/AsciiMath/config.js
+++ b/unpacked/jax/input/AsciiMath/config.js
@@ -36,6 +36,7 @@ MathJax.InputJax.AsciiMath = MathJax.InputJax({
   
   config: {
     fixphi: true,                     // switch phi and varphi unicode values
+    useMathMLspacing: true,           // use MathML spacing rather than TeX spacing?
     displaystyle: true,               // put limits above and below operators
     decimalsign: "."                  // can change to "," but watch out for "(1,2)"
   }
diff --git a/unpacked/jax/input/AsciiMath/jax.js b/unpacked/jax/input/AsciiMath/jax.js
index dbdcb712b..90d2f076b 100644
--- a/unpacked/jax/input/AsciiMath/jax.js
+++ b/unpacked/jax/input/AsciiMath/jax.js
@@ -160,7 +160,11 @@
   //
   var document = {
     getElementById: true,
-    createElementNS: function (ns,type) {return MML[type]()},
+    createElementNS: function (ns,type) {
+      var node = MML[type]();
+      if (type === "mo" && ASCIIMATH.config.useMathMLspacing) {node.useMMLspacing = 0x80}
+      return node;
+    },
     createTextNode: function (text) {return MML.chars(text).With({nodeValue:text})},
     createDocumentFragment: function () {return DOCFRAG()}
   };