diff --git a/unpacked/jax/output/CommonHTML/jax.js b/unpacked/jax/output/CommonHTML/jax.js
index 8e46653a9..c8ac52b58 100644
--- a/unpacked/jax/output/CommonHTML/jax.js
+++ b/unpacked/jax/output/CommonHTML/jax.js
@@ -205,7 +205,9 @@
 	  className:"MathJax_CHTML", id:jax.inputID+"-Frame", isMathJax:true, jaxID:this.id,
           oncontextmenu:EVENT.Menu, onmousedown: EVENT.Mousedown,
           onmouseover:EVENT.Mouseover, onmouseout:EVENT.Mouseout, onmousemove:EVENT.Mousemove,
-	  onclick:EVENT.Click, ondblclick:EVENT.DblClick
+	  onclick:EVENT.Click, ondblclick:EVENT.DblClick,
+          // Added for keyboard accessible menu.
+          onkeydown: EVENT.Keydown, tabIndex: "0"  
         });
 	if (HUB.Browser.noContextMenu) {
 	  span.ontouchstart = TOUCH.start;
diff --git a/unpacked/jax/output/HTML-CSS/jax.js b/unpacked/jax/output/HTML-CSS/jax.js
index 79b915d90..8e900f6d9 100644
--- a/unpacked/jax/output/HTML-CSS/jax.js
+++ b/unpacked/jax/output/HTML-CSS/jax.js
@@ -571,7 +571,9 @@
           oncontextmenu:EVENT.Menu, onmousedown: EVENT.Mousedown,
           onmouseover:EVENT.Mouseover, onmouseout:EVENT.Mouseout,
           onmousemove:EVENT.Mousemove, onclick:EVENT.Click,
-          ondblclick:EVENT.DblClick, onkeydown: EVENT.Keydown, tabIndex: "0"
+          ondblclick:EVENT.DblClick,
+          // Added for keyboard accessible menu.
+          onkeydown: EVENT.Keydown, tabIndex: "0"
         });
 	if (HUB.Browser.noContextMenu) {
 	  span.ontouchstart = TOUCH.start;
@@ -2869,7 +2871,6 @@
           var alttext = this.Get("alttext");
           if (alttext && !span.getAttribute("aria-label")) span.setAttribute("aria-label",alttext);
           if (!span.getAttribute("role")) span.setAttribute("role","math");
-//        span.setAttribute("tabindex",0);  // causes focus outline, so disable for now
 	  stack = HTMLCSS.createStack(span); box = HTMLCSS.createBox(stack);
           // Move font-size from outer span to stack to avoid line separation 
           // problem in strict HTML mode
diff --git a/unpacked/jax/output/NativeMML/jax.js b/unpacked/jax/output/NativeMML/jax.js
index 3c6f7c289..3d444f745 100644
--- a/unpacked/jax/output/NativeMML/jax.js
+++ b/unpacked/jax/output/NativeMML/jax.js
@@ -326,6 +326,9 @@
         container.onmousedown   = EVENT.Mousedown;
         container.onclick       = EVENT.Click;
         container.ondblclick    = EVENT.DblClick;
+        // Added for keyboard accessible menu.
+        container.onkeydown = EVENT.Keydown;
+        container.tabIndex = "0";
 	if (HUB.Browser.noContextMenu) {
 	  container.ontouchstart = TOUCH.start;
 	  container.ontouchend   = TOUCH.end;
diff --git a/unpacked/jax/output/SVG/jax.js b/unpacked/jax/output/SVG/jax.js
index 67b6973cc..50f696038 100644
--- a/unpacked/jax/output/SVG/jax.js
+++ b/unpacked/jax/output/SVG/jax.js
@@ -220,7 +220,9 @@
  	  className:"MathJax_SVG", id:jax.inputID+"-Frame", isMathJax:true, jaxID:this.id,
           oncontextmenu:EVENT.Menu, onmousedown: EVENT.Mousedown,
           onmouseover:EVENT.Mouseover, onmouseout:EVENT.Mouseout, onmousemove:EVENT.Mousemove,
-	  onclick:EVENT.Click, ondblclick:EVENT.DblClick
+	  onclick:EVENT.Click, ondblclick:EVENT.DblClick,
+          // Added for keyboard accessible menu.
+          onkeydown: EVENT.Keydown, tabIndex: "0"
         });
 	if (HUB.Browser.noContextMenu) {
 	  span.ontouchstart = TOUCH.start;