diff --git a/exercises/variables/variables3.rs b/exercises/variables/variables3.rs
index c03a77b3..59ca390b 100644
--- a/exercises/variables/variables3.rs
+++ b/exercises/variables/variables3.rs
@@ -1,7 +1,7 @@
 // variables3.rs
 // Execute `rustlings hint variables3` or use the `hint` watch subcommand for a hint.
 
-// I AM NOT DONE
+
 
 fn main() {
     let x: i32 = 10;
diff --git a/exercises/variables/variables4.rs b/exercises/variables/variables4.rs
index 54491b0a..ae3d20e9 100644
--- a/exercises/variables/variables4.rs
+++ b/exercises/variables/variables4.rs
@@ -4,7 +4,7 @@
 // I AM NOT DONE
 
 fn main() {
-    let x = 3;
+    let mut x = 3;
     println!("Number {}", x);
     x = 5; // don't change this line
     println!("Number {}", x);