diff --git a/user/selector/lib.php b/user/selector/lib.php
index 9cb416fb21c..f467851c666 100644
--- a/user/selector/lib.php
+++ b/user/selector/lib.php
@@ -262,7 +262,7 @@ abstract class user_selector_base {
             $multiselect = 'multiple="multiple" ';
         }
         $output = '<div class="userselector" id="' . $this->name . '_wrapper">' . "\n" .
-                '<select name="' . $name . '" id="' . $this->name . '" ' .
+                '<select name="' . $name . '" id="' . $this->name . '" aria-live="polite" ' .
                 $multiselect . 'size="' . $this->rows . '" class="form-control no-overflow">' . "\n";
 
         // Populate the select.