diff --git a/snippets/is-array.md b/snippets/is-array.md
index 7652f74c9..939cb086d 100644
--- a/snippets/is-array.md
+++ b/snippets/is-array.md
@@ -3,7 +3,7 @@
 Use `Array.isArray()` to check if a value is classified as an array.
 
 ```js
-const isArray = val => val && Array.isArray(val);
+const isArray = val => !!val && Array.isArray(val);
 // isArray(null) -> false
 // isArray([1]) -> true
 ```