diff --git a/1-js/09-classes/06-instanceof/article.md b/1-js/09-classes/06-instanceof/article.md
index f9db989ca9..a83d01b809 100644
--- a/1-js/09-classes/06-instanceof/article.md
+++ b/1-js/09-classes/06-instanceof/article.md
@@ -55,7 +55,7 @@ The algorithm of `obj instanceof Class` works roughly as follows:
For example:
```js run
- // setup instanceOf check that assumes that
+ // setup instanceof check that assumes that
// anything with canEat property is an animal
class Animal {
static [Symbol.hasInstance](obj) {
@@ -68,7 +68,7 @@ The algorithm of `obj instanceof Class` works roughly as follows:
alert(obj instanceof Animal); // true: Animal[Symbol.hasInstance](obj) is called
```
-2. Most classes do not have `Symbol.hasInstance`. In that case, the standard logic is used: `obj instanceOf Class` checks whether `Class.prototype` is equal to one of the prototypes in the `obj` prototype chain.
+2. Most classes do not have `Symbol.hasInstance`. In that case, the standard logic is used: `obj instanceof Class` checks whether `Class.prototype` is equal to one of the prototypes in the `obj` prototype chain.
In other words, compare one after another:
```js
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