diff --git a/README.md b/README.md
index b203a060..c129d33d 100644
--- a/README.md
+++ b/README.md
@@ -493,7 +493,7 @@ function sum(a, b) {
   return a + b;
 }
 
-sum(1, '2');
+console.log(sum(1, '2'););
 ```
 
 - A: `NaN`