diff --git a/files/renderer.php b/files/renderer.php
index 5f9eb61d9bc..3026134dbdd 100644
--- a/files/renderer.php
+++ b/files/renderer.php
@@ -803,8 +803,8 @@ class core_files_renderer extends plugin_renderer_base {
      */
     private function fp_js_template_message() {
         $rv = '
-<div class="file-picker fp-msg">
-    <p class="{!}fp-msg-text"></p>
+<div class="file-picker fp-msg" role="alertdialog" aria-live="assertive" aria-labelledby="fp-msg-labelledby">
+    <p class="{!}fp-msg-text" id="fp-msg-labelledby"></p>
     <button class="{!}fp-msg-butok">'.get_string('ok').'</button>
 </div>';
         return preg_replace('/\{\!\}/', '', $rv);