diff --git a/game/src/game/mod.rs b/game/src/game/mod.rs
index 661628a..66e1f13 100644
--- a/game/src/game/mod.rs
+++ b/game/src/game/mod.rs
@@ -94,7 +94,7 @@ impl Game {
 
                     // Check if piece is promoted.
                     let hex = Hex::from_tile(play.from);
-                    let offset = (piece.player as i8 * 2) - 1;
+                    let offset = -(piece.player as i8 * 2) + 1;
                     if !piece.promoted && !Hex::is_valid(hex.x() as i8, hex.y() as i8 + offset) {
                         if let Some(piece) = &mut self.board.pieces[pid as usize] {
                             piece.promoted = true;