diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/use-typeof-to-check-the-type-of-a-variable.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/use-typeof-to-check-the-type-of-a-variable.md
index 866916b9b8..f343e3a51b 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/use-typeof-to-check-the-type-of-a-variable.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/debugging/use-typeof-to-check-the-type-of-a-variable.md
@@ -21,7 +21,7 @@ console.log(typeof {});
 
 In order, the console will display the strings `string`, `number`, `object`, and `object`.
 
-JavaScript recognizes six primitive (immutable) data types: `Boolean`, `Null`, `Undefined`, `Number`, `String`, and `Symbol` (new with ES6) and one type for mutable items: `Object`. Note that in JavaScript, arrays are technically a type of object.
+JavaScript recognizes seven primitive (immutable) data types: `Boolean`, `Null`, `Undefined`, `Number`, `String`, `Symbol` (new with ES6), and `BigInt` (new with ES2020), and one type for mutable items: `Object`. Note that in JavaScript, arrays are technically a type of object.
 
 # --instructions--