diff --git a/board/src/piece_sets.rs b/board/src/piece_sets.rs
index 02a7152..2371d45 100644
--- a/board/src/piece_sets.rs
+++ b/board/src/piece_sets.rs
@@ -92,11 +92,8 @@ impl PieceSet {
         strategy: PlacePieceStrategy,
     ) -> Result<(), PlacePieceError> {
         if strategy == PlacePieceStrategy::PreserveExisting {
-            if let Some(existing_piece) = self.mailbox.get(square) {
-                return Err(PlacePieceError::ExisitingPiece(PlacedPiece::new(
-                    existing_piece,
-                    square,
-                )));
+            if let Some(piece) = self.mailbox.get(square) {
+                return Err(PlacePieceError::ExisitingPiece { piece, square });
             }
         }