diff --git a/popup.js b/popup.js
index 9d8d63d..b9ec59a 100644
--- a/popup.js
+++ b/popup.js
@@ -13,7 +13,7 @@
 
     var closed;
 
-    var $popup = $('<div class="h5p-memory-pop" role="dialog"><div class="h5p-memory-top"></div><div class="h5p-memory-desc h5p-programatically-focusable" tabindex="-1"></div><div class="h5p-memory-close" role="button" tabindex="0" title="' + (l10n.closeLabel || 'Close') + '"></div></div>').appendTo($container);
+    var $popup = $('<div class="h5p-memory-pop" role="dialog"><div class="h5p-memory-top"></div><div class="h5p-memory-desc h5p-programatically-focusable" tabindex="-1"></div><div class="h5p-memory-close" role="button" tabindex="0" title="' + (l10n.closeLabel || 'Close') + '" aria-label="' + (l10n.closeLabel || 'Close') + '"></div></div>').appendTo($container);
     var $desc = $popup.find('.h5p-memory-desc');
     var $top = $popup.find('.h5p-memory-top');