diff --git a/board/src/zobrist.rs b/board/src/zobrist.rs
index 911bd26..b5a5d43 100644
--- a/board/src/zobrist.rs
+++ b/board/src/zobrist.rs
@@ -10,11 +10,10 @@
 //! [1]: https://www.chessprogramming.org/Zobrist_Hashing
 
 use crate::{castle, Board};
-use chessfriend_core::{random::RandomNumberGenerator, Color, File, Piece, Shape, Square, Wing};
+use chessfriend_core::{random::RandomNumberGenerator, Color, File, Piece, Shape, Square};
 use rand::Fill;
 use std::sync::Arc;
 
-const NUM_SQUARE_PIECE_VALUES: usize = Shape::NUM * Color::NUM * Square::NUM;
 const NUM_CASTLING_RIGHTS_VALUES: usize = 16;
 
 type HashValue = u64;