diff --git a/amazon-shorten.user.js b/amazon-shorten.user.js
index f9240aa..6351ed0 100644
--- a/amazon-shorten.user.js
+++ b/amazon-shorten.user.js
@@ -4,6 +4,5 @@
 "use strict";
 
 const { pathname } = window.location;
-const dp = pathname.match(/(?<=\/(?:dp|gp\/product)\/)\w*/)?.[0];
-const to = dp && `/dp/${dp}`;
-if (to && pathname !== to) window.history.replaceState(null, "", to);
+const dp = pathname.match(/(?<=\/dp\/|\/gp\/product\/)\w*/)?.[0];
+if (dp) window.history.replaceState(null, "", `/dp/${dp}`);