diff --git a/unpacked/extensions/HelpDialog.js b/unpacked/extensions/HelpDialog.js
index 2c16eb1ca..659408789 100644
--- a/unpacked/extensions/HelpDialog.js
+++ b/unpacked/extensions/HelpDialog.js
@@ -155,8 +155,8 @@
       ]],
       ["a",{href:"http://www.mathjax.org/"},["www.mathjax.org"]],
       ["span",{id: "MathJax_HelpClose", onclick: HELP.Remove,
-               onkeydown: HELP.Keydown, tabIndex: 0,
-               "aria-label": "Close", "aria-describedby": "Close window"},
+               onkeydown: HELP.Keydown, tabIndex: 0, role: "button",
+               "aria-label": "Close window"},
         [["span",{},["\u00D7"]]]
       ]
     ]));
diff --git a/unpacked/extensions/MathMenu.js b/unpacked/extensions/MathMenu.js
index 1bb2834af..a76a0122b 100644
--- a/unpacked/extensions/MathMenu.js
+++ b/unpacked/extensions/MathMenu.js
@@ -1048,8 +1048,8 @@
       ["a",{href:"http://www.mathjax.org/"},["www.mathjax.org"]],
       ["span",{className:"MathJax_MenuClose",id:"MathJax_AboutClose",
                onclick:MENU.About.Remove,
-               onkeydown: MENU.About.Keydown, tabIndex: 0,
-               "aria-label": "Close", "aria-describedby": "Close window"},
+               onkeydown: MENU.About.Keydown, tabIndex: 0, role: "button",
+               "aria-label": "Close window"},
         [["span",{},"\u00D7"]]]
     ]);
     about.focus();