diff --git a/1-js/02-first-steps/17-arrow-functions-basics/article.md b/1-js/02-first-steps/17-arrow-functions-basics/article.md
index 7d03614764..3567e974e0 100644
--- a/1-js/02-first-steps/17-arrow-functions-basics/article.md
+++ b/1-js/02-first-steps/17-arrow-functions-basics/article.md
@@ -64,7 +64,7 @@ alert( sum(1, 2) ); // 3
 let age = prompt("What is your age?", 18);
 
 let welcome = (age < 18) ?
-  () => alert('Hello'!) :
+  () => alert('Hello!') :
   () => alert("Greetings!");
 
 welcome();