diff --git a/lib/internal/url.js b/lib/internal/url.js
index 3b61f432b91dad..4f42cb1dedca8d 100644
--- a/lib/internal/url.js
+++ b/lib/internal/url.js
@@ -101,7 +101,6 @@ const FORWARD_SLASH = /\//g;
 
 const context = Symbol('context');
 const searchParams = Symbol('query');
-const kFormat = Symbol('format');
 
 const updateActions = {
   kProtocol: 0,
@@ -794,7 +793,6 @@ class URL {
 }
 
 ObjectDefineProperties(URL.prototype, {
-  [kFormat]: { __proto__: null, configurable: false, writable: false },
   [SymbolToStringTag]: { __proto__: null, configurable: true, value: 'URL' },
   toString: kEnumerableProperty,
   href: kEnumerableProperty,