diff --git a/README.md b/README.md
index afe01606..d03f399c 100644
--- a/README.md
+++ b/README.md
@@ -70,16 +70,16 @@ Each function parameter and return value is given to _all_ registered transfer h
 
 ```js
 Comlink.transferHandlers.set("EVENT", {
-  canHandle: obj => obj instanceOf Event,
+  canHandle: obj => obj instanceof Event,
   serialize: ev => {
-    return {
+    return [{
       target: {
         id: ev.target.id
         classList: [...ev.target.classList]
       }
-    };
-  }
-  deserialize: obj => obj
+    }, []];
+  },
+  deserialize: obj => obj,
 });
 ```