diff --git a/app/pin_numbers/pin_number_edit.php b/app/pin_numbers/pin_number_edit.php
index c443a99cfa..20ba837070 100644
--- a/app/pin_numbers/pin_number_edit.php
+++ b/app/pin_numbers/pin_number_edit.php
@@ -66,6 +66,14 @@ if (count($_POST)>0 && strlen($_POST["persistformvar"]) == 0) {
 		$pin_number_uuid = $_POST["pin_number_uuid"];
 	}
 
+	//validate the token
+		$token = new token;
+		if (!$token->validate($_SERVER['PHP_SELF'])) {
+			message::add($text['message-invalid_token'],'negative');
+			header('Location: pin_numbers.php');
+			exit;
+		}
+
 	//check for all required data
 		if (strlen($pin_number) == 0) { $msg .= $text['message-required']." ".$text['label-pin_number']."<br>\n"; }
 		//if (strlen($accountcode) == 0) { $msg .= $text['message-required']." ".$text['label-accountcode']."<br>\n"; }
@@ -141,6 +149,10 @@ if (count($_POST)>0 && strlen($_POST["persistformvar"]) == 0) {
 		unset($sql, $parameters, $row);
 	}
 
+//create token
+	$object = new token;
+	$token = $object->create($_SERVER['PHP_SELF']);
+
 //show the header
 	require_once "resources/header.php";
 
@@ -214,9 +226,10 @@ if (count($_POST)>0 && strlen($_POST["persistformvar"]) == 0) {
 	echo "	<tr>\n";
 	echo "		<td colspan='2' align='right'>\n";
 	if ($action == "update") {
-		echo "				<input type='hidden' name='pin_number_uuid' value='".escape($pin_number_uuid)."'>\n";
+		echo "			<input type='hidden' name='pin_number_uuid' value='".escape($pin_number_uuid)."'>\n";
 	}
-	echo "				<input type='submit' name='submit' class='btn' value='".$text['button-save']."'>\n";
+	echo "			<input type='hidden' name='".$token['name']."' value='".$token['hash']."'>\n";
+	echo "			<input type='submit' name='submit' class='btn' value='".$text['button-save']."'>\n";
 	echo "		</td>\n";
 	echo "	</tr>";
 	echo "</table>";