diff --git a/src/variants.ini b/src/variants.ini
index 7eaeafb33..0810312c6 100644
--- a/src/variants.ini
+++ b/src/variants.ini
@@ -1823,8 +1823,10 @@ pieceToCharTable = PNBRQ.............MKpnbrq.............mk
 customPiece1 = r:RmF
 customPiece2 = n:NmK
 customPiece3 = b:BmW
-customPiece1 = m:KAD
+customPiece4 = m:KAD
 promotionPieceTypes = mqnbr
+castling = true
+castlingRookPieces = r
 startFen = rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR[MMmm] w KQkq - 0 1
 pieceDrops = true
 whiteDropRegion = *1