diff --git a/src/utils/chess.ts b/src/utils/chess.ts
index 8f912ea6..dcbabbba 100644
--- a/src/utils/chess.ts
+++ b/src/utils/chess.ts
@@ -220,6 +220,7 @@ export function getPGN(
         pgn += headersToPGN(headers);
     }
     if (root && tree.fen !== DEFAULT_POSITION) {
+        pgn += '[SetUp "1"]\n'
         pgn += '[FEN "' + tree.fen + '"]\n';
     }
     pgn += "\n";