diff --git a/exercises/functions/functions5.rs b/exercises/functions/functions5.rs
index a11733cf..62c3a40a 100644
--- a/exercises/functions/functions5.rs
+++ b/exercises/functions/functions5.rs
@@ -1,6 +1,7 @@
 // functions5.rs
 // Execute `rustlings hint functions5` or use the `hint` watch subcommand for a hint.
 
+// Functions Exercise is completed
 
 fn main() {
     let answer = square(3);