diff --git a/packages/website/content/blog/fundamentals-v4/11-classes/index.md b/packages/website/content/blog/fundamentals-v4/11-classes/index.md
index 086c6ba3d..fef178834 100644
--- a/packages/website/content/blog/fundamentals-v4/11-classes/index.md
+++ b/packages/website/content/blog/fundamentals-v4/11-classes/index.md
@@ -354,7 +354,7 @@ class Car {
       #serialNumber in other) {
         other
 //       ^?
-        return other.#serialNumber = this.#serialNumber
+        return other.#serialNumber === this.#serialNumber
       }
       return false
   }