diff --git a/routes/ping.js b/routes/ping.js
index 48e8cab..fd0fd33 100644
--- a/routes/ping.js
+++ b/routes/ping.js
@@ -41,6 +41,7 @@ router.get("/:fqdn/:code", testIP, (req, res) => {
 	let addr = req.params.addr;
     db.query("UPDATE addresses SET " + addr.kind() + " = ? WHERE fqdn = ? AND code = ?", [addr.toString(), req.params.fqdn, req.params.code], (e, d) => {
 		if (e) return res.status(400).send("Error");
+		if (d.affectedRows <= 0) return res.status(400).send("Invalid token");
 		res.send(addr.toString());
 	});
 });