diff --git a/src/main.rs b/src/main.rs
index fc41c56..a7409e7 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -473,8 +473,8 @@ 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)?;