diff --git a/lib/internal/crypto/keys.js b/lib/internal/crypto/keys.js
index bb7dd7dbd0d1eb..3304615f4c110a 100644
--- a/lib/internal/crypto/keys.js
+++ b/lib/internal/crypto/keys.js
@@ -750,6 +750,15 @@ class InternalCryptoKey {
     this[kExtractable] = extractable;
   }
 }
+
+ObjectDefineProperties(CryptoKey.prototype, {
+  [SymbolToStringTag]: {
+    __proto__: null,
+    configurable: true,
+    value: 'CryptoKey',
+  },
+});
+
 InternalCryptoKey.prototype.constructor = CryptoKey;
 ObjectSetPrototypeOf(InternalCryptoKey.prototype, CryptoKey.prototype);