diff --git a/exercises/01_variables/variables2.rs b/exercises/01_variables/variables2.rs
index e2a360351a..43db02e3de 100644
--- a/exercises/01_variables/variables2.rs
+++ b/exercises/01_variables/variables2.rs
@@ -1,6 +1,6 @@
 fn main() {
     // TODO: Change the line below to fix the compiler error.
-    let x;
+    let x: i32 = 10;
 
     if x == 10 {
         println!("x is ten!");