diff --git a/snippets/capitalize-first-letter.md b/snippets/capitalize-first-letter.md
index 56e42eab5..84447ee21 100644
--- a/snippets/capitalize-first-letter.md
+++ b/snippets/capitalize-first-letter.md
@@ -3,5 +3,5 @@
 Use `toUpperCase()` to capitalize first letter, `slice(1)` to get the rest of the string.
 
 ```js
-var capitalize = str => str[0].toUpperCase() + str.slice(1);
+var capitalize = str => str.slice(0, 1).toUpperCase() + str.slice(1);
 ```