diff --git a/system/language/english/validation_lang.php b/system/language/english/validation_lang.php
index f26115f..7da801d 100644
--- a/system/language/english/validation_lang.php
+++ b/system/language/english/validation_lang.php
@@ -3,6 +3,7 @@
 $lang['required'] 		= "The %s field is required.";
 $lang['isset']			= "The %s field must have a value.";
 $lang['valid_email']	= "The %s field must contain a valid email address.";
+$lang['valid_emails'] 	= "The %s field must contain all valid email addresses.";
 $lang['valid_url'] 		= "The %s field must contain a valid URL.";
 $lang['valid_ip'] 		= "The %s field must contain a valid IP.";
 $lang['min_length']		= "The %s field must be at least %s characters in length.";
@@ -15,6 +16,6 @@
 $lang['integer']		= "The %s field must contain an integer.";
 $lang['matches']		= "The %s field does not match the %s field.";
 
-
-/* End of file validation_lang.php */
+
+/* End of file validation_lang.php */
 /* Location: ./system/language/english/validation_lang.php */
\ No newline at end of file
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>