diff --git a/src/gamedata/mod.rs b/src/gamedata/mod.rs
index 9f3e473..2253daa 100644
--- a/src/gamedata/mod.rs
+++ b/src/gamedata/mod.rs
@@ -99,7 +99,7 @@ impl Board {
     }
 }
 
-#[derive(Copy, Clone, Debug)]
+#[derive(Copy, Clone, Debug, PartialEq, Eq)]
 pub enum Disk {
     RED,
     BLU,