diff --git a/doc/faq.rst b/doc/faq.rst
index c82483c102..8da661c68a 100644
--- a/doc/faq.rst
+++ b/doc/faq.rst
@@ -1056,6 +1056,17 @@ accordingly. This is done for the sake of efficiency.
 At some point, the character set used to store bookmark content has changed.
 It's better to recreate your bookmark from the newer phpMyAdmin version.
 
+.. _faq3_21:
+
+3.21 I am unable to log in with a username containing UTF-8 characters such as á.
+---------------------------------------------------------------------------------
+
+This is a limitation of how PHP and the MySQL server interact; there is no way for PHP
+to set the charset before authenticating.
+
+.. seealso:: `phpMyAdmin issue <https://github.com/phpmyadmin/phpmyadmin/issues/12232>`_
+.. seealso:: `MySQL documentation note <http://php.net/manual/en/mysqli.real-connect.php#refsect1-mysqli.real-connect-notes>`_
+
 .. _faqmultiuser:
 
 ISPs, multi-user installations