diff --git a/exercises/variables/variables5.rs b/exercises/variables/variables5.rs
index da37ae99a7..175eebb35b 100644
--- a/exercises/variables/variables5.rs
+++ b/exercises/variables/variables5.rs
@@ -4,7 +4,7 @@
 // I AM NOT DONE
 
 fn main() {
-    let number = "T-H-R-E-E";
+    let number = "T-H-R-E-E"; // don't change this line
     println!("Spell a Number : {}", number);
     number = 3;
     println!("Number plus two is : {}", number + 2);