diff --git a/src/main.rs b/src/main.rs
index 6ebc2ad..25a2adc 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -465,8 +465,8 @@ impl<const TOWER_HEIGHT: usize> Game<TOWER_HEIGHT> {
     }
 
     fn ask_tower(&self, msg: &str) -> io::Result<Input> {
+        let mut res = String::new();
         loop {
-            let mut res = String::new();
             print!("{msg} (enter a tower number, exit, clear or undo):");
             stdout().flush()?;
             stdin().read_line(&mut res)?;