diff --git a/adminer/user.inc.php b/adminer/user.inc.php
index 27f007f8..babcc100 100644
--- a/adminer/user.inc.php
+++ b/adminer/user.inc.php
@@ -133,7 +133,7 @@ if ($_POST) {
 <form action="" method="post">
 <table cellspacing="0">
 <tr><th><?php echo lang('Server'); ?><td><input name="host" maxlength="60" value="<?php echo h($row["host"]); ?>" autocapitalize="off">
-<tr><th><?php echo lang('Username'); ?><td><input name="user" maxlength="16" value="<?php echo h($row["user"]); ?>" autocapitalize="off">
+<tr><th><?php echo lang('Username'); ?><td><input name="user" maxlength="80" value="<?php echo h($row["user"]); ?>" autocapitalize="off">
 <tr><th><?php echo lang('Password'); ?><td><input name="pass" id="pass" value="<?php echo h($row["pass"]); ?>" autocomplete="new-password">
 <?php if (!$row["hashed"]) { echo script("typePassword(qs('#pass'));"); } ?>
 <?php echo checkbox("hashed", 1, $row["hashed"], lang('Hashed'), "typePassword(this.form['pass'], this.checked);"); ?>
diff --git a/changes.txt b/changes.txt
index 6b775e89..b7b5972b 100644
--- a/changes.txt
+++ b/changes.txt
@@ -2,6 +2,7 @@ Adminer 4.6.4-dev:
 Fix inline editing of empty cells (regression from 4.6.3)
 Allow adding more than two indexes and forign key columns at a time (regression from 4.4.0)
 Fix function change with set data type
+Increase username maxlength to 80 (bug #623)
 MySQL: Support foreign keys created with ANSI quotes (bug #620)
 
 Adminer 4.6.3 (released 2018-06-28):