diff --git a/user_guide/changelog.html b/user_guide/changelog.html
index 469a950..db968b0 100644
--- a/user_guide/changelog.html
+++ b/user_guide/changelog.html
@@ -94,6 +94,7 @@
 <h3>Bug fixes for 1.6.3</h3>
 
 <ul>
+	<li>Added a language key for valid_emails in validation_lang.php.</li>
 	<li>Amended fixes for bug (#3419) with parsing DSN database connections.</li>
 	<li>Moved the <kbd>_has_operators()</kbd> function (#4535) into DB_driver from DB_active_rec.</li>
 	<li>Fixed a syntax error in upload_lang.php.</li>