**Tell us what’s happening:**

What is wrong;

**Your code so far**

```
function freezeObj() {
"use strict";
const MATH_CONSTANTS = {
PI: 3.14
};
// change code below this line
Object.freeze();
// change code above this line
try {
MATH_CONSTANTS.PI = 99;
} catch( ex ) {
console.log(ex);
}
return MATH_CONSTANTS.PI;
}
const PI = freezeObj();
```

**Your browser information:**

User Agent is: `Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36`

.

**Link to the challenge:**

https://learn.freecodecamp.org/javascript-algorithms-and-data-structures/es6/prevent-object-mutation