diff --git a/unpacked/jax/input/AsciiMath/jax.js b/unpacked/jax/input/AsciiMath/jax.js
index 8a491b831..bbbf2c88d 100644
--- a/unpacked/jax/input/AsciiMath/jax.js
+++ b/unpacked/jax/input/AsciiMath/jax.js
@@ -1276,6 +1276,7 @@ junk = null;
   
   ASCIIMATH.Augment({
     sourceMenuTitle: /*_(MathMenu)*/ ["AsciiMathInput","AsciiMath Input"],
+    annotationEncoding: "text/x-asciimath",
 
     prefilterHooks:    MathJax.Callback.Hooks(true),   // hooks to run before processing AsciiMath
     postfilterHooks:   MathJax.Callback.Hooks(true),   // hooks to run after processing AsciiMath
diff --git a/unpacked/jax/input/TeX/jax.js b/unpacked/jax/input/TeX/jax.js
index 095d04eec..6ca4bc7ee 100644
--- a/unpacked/jax/input/TeX/jax.js
+++ b/unpacked/jax/input/TeX/jax.js
@@ -2061,6 +2061,7 @@
     },
     
     sourceMenuTitle: /*_(MathMenu)*/ ["TeXCommands","TeX Commands"],
+    annotationEncoding: "application/x-tex",
 
     prefilterHooks: MathJax.Callback.Hooks(true),    // hooks to run before processing TeX
     postfilterHooks: MathJax.Callback.Hooks(true),   // hooks to run after processing TeX
@@ -2087,7 +2088,6 @@
       this.prefilterHooks.Execute(data); math = data.math;
       try {
         mml = TEX.Parse(math).mml();
-//        mml = MML.semantics(mml,MML.annotation(math).With({encoding:"application/x-tex"}));
       } catch(err) {
         if (!err.texError) {throw err}
         mml = this.formatError(err,math,display,script);
diff --git a/unpacked/jax/output/NativeMML/jax.js b/unpacked/jax/output/NativeMML/jax.js
index 5b4e046aa..3eb4f698f 100644
--- a/unpacked/jax/output/NativeMML/jax.js
+++ b/unpacked/jax/output/NativeMML/jax.js
@@ -299,7 +299,7 @@
       //
       //  Convert to MathML (if restarted, remove any partial math)
       //
-      try {math.toNativeMML(mspan)} catch (err) {
+      try {math.toNativeMML(mspan,jax)} catch (err) {
         if (err.restart) {while (mspan.firstChild) {mspan.removeChild(mspan.firstChild)}}
         throw err;
       }
@@ -906,8 +906,9 @@
     }
     
     MML.math.Augment({
-      toNativeMML: function (parent) {
-        var tag = this.NativeMMLelement(this.type), math = tag, jax;
+      toNativeMML: function (parent,jax) {
+        var tag = this.NativeMMLelement(this.type), math = tag;
+        var annotate = (jax ? MathJax.InputJax[jax.inputJax].annotationEncoding : null);
         var i, m;
         nMML.adjustWidths = [];
         //
@@ -921,6 +922,17 @@
         //
         if (nMML.widthBug) {tag = tag.appendChild(this.NativeMMLelement("mrow"))}
         //
+        //  Addannotation if the input jax provides an annotation encoding
+        //
+        if (annotate) {
+          tag = tag.appendChild(this.NativeMMLelement("semantics"))
+          tag.appendChild(this.NativeMMLelement("mrow"));
+          var annotation = tag.appendChild(this.NativeMMLelement("annotation"));
+          annotation.appendChild(document.createTextNode(jax.originalText));
+          annotation.setAttribute("encoding",annotate);
+          tag = tag.firstChild; // mrow
+        }
+        //
         //  Add the children
         //
         for (i = 0, m = this.data.length; i < m; i++) {
@@ -966,7 +978,6 @@
           //
           //  Save size for later when we check if Web fonts have arrived
           //
-          jax = HUB.getJaxFor(parent);
           if (jax) {jax.NativeMML.scrollWidth = math.firstChild.scrollWidth}
         }
         if (nMML.adjustWidths.length) {