diff --git a/board/src/position/builders/move_builder.rs b/board/src/position/builders/move_builder.rs
index e899793..97802c1 100644
--- a/board/src/position/builders/move_builder.rs
+++ b/board/src/position/builders/move_builder.rs
@@ -156,7 +156,7 @@ impl<'p> Builder<'p, ValidatedMove> {
                 if let Some(promotion) = promotion {
                     pieces.remove_piece(&moving_piece);
                     let _ = pieces
-                        .place_piece(PlacedPiece::new(Piece::new(player, promotion), to_square));
+                        .place_piece(&PlacedPiece::new(Piece::new(player, promotion), to_square));
                 } else {
                     pieces.move_piece(moving_piece.piece(), from_square, to_square);
                 }
diff --git a/board/src/position/piece_sets.rs b/board/src/position/piece_sets.rs
index 07a1f03..cc01eda 100644
--- a/board/src/position/piece_sets.rs
+++ b/board/src/position/piece_sets.rs
@@ -74,13 +74,13 @@ impl PieceBitBoards {
         self.by_color_and_shape.bitboard_for_piece_mut(piece)
     }
 
-    pub(super) fn place_piece(&mut self, piece: PlacedPiece) -> Result<(), PlacePieceError> {
+    pub(super) fn place_piece(&mut self, piece: &PlacedPiece) -> Result<(), PlacePieceError> {
         self.place_piece_with_strategy(piece, Default::default())
     }
 
     pub(super) fn place_piece_with_strategy(
         &mut self,
-        piece: PlacedPiece,
+        piece: &PlacedPiece,
         strategy: PlacePieceStrategy,
     ) -> Result<(), PlacePieceError> {
         let color = piece.color();
@@ -124,7 +124,7 @@ impl FromIterator<PlacedPiece> for PieceBitBoards {
         let mut pieces = Self::default();
 
         for piece in iter {
-            let _ = pieces.place_piece(piece);
+            let _ = pieces.place_piece(&piece);
         }
 
         pieces