diff --git a/src/geometry.rs b/src/geometry.rs
index beb8597..80c9f07 100644
--- a/src/geometry.rs
+++ b/src/geometry.rs
@@ -28,7 +28,7 @@ impl Point {
 }
 
 /// Rectangle region on the map
-#[derive(PartialEq, Copy, Clone, Debug)]
+#[derive(Hash, PartialEq, Eq, Copy, Clone, Debug)]
 pub struct Rect {
     pub x1: usize,
     pub x2: usize,