diff --git a/src/Game/Game.php b/src/Game/Game.php
index ddb37b3..66cb382 100644
--- a/src/Game/Game.php
+++ b/src/Game/Game.php
@@ -46,7 +46,7 @@ class Game {
             }
         }
 
-        throw new \RuntimeException("piece not found: " . $piece);
+        throw new \RuntimeException("piece not found: " . $needle);
     }
 
     private function removePiece(Piece $needle): void {