Sass: Create Reusable CSS with Mixins - Cant find the problem

Tell us what’s happening:
I cannot understand what I am missing here…

Your code so far

<style type='text/sass'>
	@mixin border-radius($radius) {
 border-radius: $radius;

 #awesome {
   width: 150px;
   height: 150px;
   background-color: green; 
   @include border-radius(15px)

<div id="awesome"></div>

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User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.79 Safari/537.36.

Challenge: Create Reusable CSS with Mixins

Link to the challenge:

Solved it… I had forgotten a semicolon… (-.-)
@include border-radius(15px) // Wrong
@include border-radius(15px); // Correct