diff --git a/src/main.rs b/src/main.rs
index 6cde3d7..54baa26 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -17,10 +17,10 @@ impl World {
     /// Set robot on the map.
     fn set_robot(&mut self, r: Robot) {
         self.map[(r.p.x * r.p.y) as usize] = match r.o {
-            Orientation::N => '⬆',
-            Orientation::S => '⬇',
-            Orientation::E => '➡',
-            Orientation::W => '⬅',
+            Orientation::N => '↑',
+            Orientation::S => '↓',
+            Orientation::E => '→',
+            Orientation::W => '←',
         }
     }
 }