diff --git a/snippets/countBy.md b/snippets/countBy.md
index 31a5d2ae3..2d3d1bbde 100644
--- a/snippets/countBy.md
+++ b/snippets/countBy.md
@@ -19,5 +19,5 @@ const countBy = (arr, fn) =>
 ```js
 countBy([6.1, 4.2, 6.3], Math.floor); // {4: 1, 6: 2}
 countBy(['one', 'two', 'three'], 'length'); // {3: 2, 5: 1}
-countBy([{ count: 5 }, { count: 10 }, { count: 5 }], item => item.count) // {5: 2, 10: 1}
+countBy([{ count: 5 }, { count: 10 }, { count: 5 }], x => x.count) // {5: 2, 10: 1}
 ```