diff --git a/core/modules/user/src/AccountForm.php b/core/modules/user/src/AccountForm.php
index f1c505d..4593c45 100644
--- a/core/modules/user/src/AccountForm.php
+++ b/core/modules/user/src/AccountForm.php
@@ -104,7 +104,7 @@ public function form(array $form, FormStateInterface $form_state) {
       '#type' => 'textfield',
       '#title' => $this->t('Username'),
       '#maxlength' => USERNAME_MAX_LENGTH,
-      '#description' => $this->t('Spaces are allowed; punctuation is not allowed except for periods, hyphens, apostrophes, and underscores.'),
+      '#description' => $this->t("Spaces or special characters are also allowed like periods(.), apostrophes('), underscores(_), hyphens(-) and @ symbol."),
       '#required' => TRUE,
       '#attributes' => array(
         'class' => array('username'),