diff --git a/usr/local/www/vpn_pppoe_users_edit.php b/usr/local/www/vpn_pppoe_users_edit.php
index 4450c561ca..450a593955 100755
--- a/usr/local/www/vpn_pppoe_users_edit.php
+++ b/usr/local/www/vpn_pppoe_users_edit.php
@@ -81,7 +81,7 @@ if ($_POST) {
 	
 	do_input_validation($_POST, $reqdfields, $reqdfieldsn, &$input_errors);
 	
-	if (preg_match("/[^a-zA-Z0-9\.\-_]/", $_POST['username']))
+	if (preg_match("/[^a-zA-Z0-9\.\-\@_]/", $_POST['username']))
 		$input_errors[] = "The username contains invalid characters.";
 		
 	if (preg_match("/[^a-zA-Z0-9\.\-_]/", $_POST['password']))