diff --git a/src/Lynx/Model/GameState.cs b/src/Lynx/Model/GameState.cs
index a2f280467..67f74ccc0 100644
--- a/src/Lynx/Model/GameState.cs
+++ b/src/Lynx/Model/GameState.cs
@@ -9,7 +9,7 @@ public readonly struct GameState
 
     public readonly BoardSquare EnPassant;
 
-    public GameState(sbyte capturedPiece, byte castle, BoardSquare enpassant, long zobristKey)
+    public GameState(long zobristKey, sbyte capturedPiece, byte castle, BoardSquare enpassant)
     {
         CapturedPiece = capturedPiece;
         Castle = castle;
diff --git a/src/Lynx/Model/Position.cs b/src/Lynx/Model/Position.cs
index 28101f4be..9bb725ebc 100644
--- a/src/Lynx/Model/Position.cs
+++ b/src/Lynx/Model/Position.cs
@@ -338,7 +338,7 @@ public GameState MakeMove(Move move)
 
         UniqueIdentifier ^= ZobristTable.CastleHash(Castle);
 
-        return new GameState(capturedPiece, castleCopy, enpassantCopy, uniqueIdentifierCopy);
+        return new GameState(uniqueIdentifierCopy, capturedPiece, castleCopy, enpassantCopy);
         //var clone = new Position(this);
         //clone.UnmakeMove(move, gameState);
         //if (uniqueIdentifierCopy != clone.UniqueIdentifier)
@@ -436,7 +436,7 @@ public GameState MakeNullMove()
             ZobristTable.SideHash()
             ^ ZobristTable.EnPassantHash((int)oldEnPassant);
 
-        return new GameState(-1, byte.MaxValue, oldEnPassant, oldUniqueIdentifier);
+        return new GameState(oldUniqueIdentifier, -1, byte.MaxValue, oldEnPassant);
     }
 
     [MethodImpl(MethodImplOptions.AggressiveInlining)]