diff --git a/view/login.php b/view/login.php
index fe6c1a84e0e571ba7fc66bfa66cdf6cde7514a85..00261b54be36cba1f0aace2fcfa377291f5d52d6 100644
--- a/view/login.php
+++ b/view/login.php
@@ -46,7 +46,7 @@
                 <form method="POST" action="" id="login_form">
                     <tr>
                         <td><label>Username</label></td>
-                        <td><input id="field_username" type="text" name="username" value="<?php if (isset($username)) { echo $username; } ?>" autofocus/></td>
+                        <td><input id="field_username" type="text" name="username" pattern="" value="<?php if (isset($username)) { echo escapeHTML($username); } ?>" autofocus/></td>
                     </tr>
                     <tr>
                         <td><label>Password</label></td>