diff --git a/src/fen.rs b/src/fen.rs
index e0de06c2..2f80f44c 100644
--- a/src/fen.rs
+++ b/src/fen.rs
@@ -358,7 +358,7 @@ impl fmt::Display for Board {
 }
 
 /// A parsed FEN.
-#[derive(Clone, Eq, PartialEq, Debug)]
+#[derive(Clone, Eq, PartialEq, Hash, Debug)]
 pub struct Fen {
     pub board: Board,
     pub pockets: Option<Material>,
diff --git a/src/position.rs b/src/position.rs
index 69ebc715..ac9c96b3 100644
--- a/src/position.rs
+++ b/src/position.rs
@@ -32,7 +32,7 @@ use crate::setup::{Castles, EpSquare, Setup, SwapTurn};
 use crate::movelist::MoveList;
 
 /// Outcome of a game.
-#[derive(Copy, Clone, Eq, PartialEq, Debug)]
+#[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
 pub enum Outcome {
     Decisive { winner: Color },
     Draw,
diff --git a/src/types.rs b/src/types.rs
index 2177a04d..12f33285 100644
--- a/src/types.rs
+++ b/src/types.rs
@@ -204,7 +204,7 @@ impl Piece {
 }
 
 /// Information about a move.
-#[derive(Clone, Eq, PartialEq, Debug)]
+#[derive(Clone, Eq, PartialEq, Hash, Debug)]
 #[repr(align(4))]
 pub enum Move {
     Normal {