diff --git a/chess/__init__.py b/chess/__init__.py
index 9ea44f36..52089f1f 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -2817,7 +2817,7 @@ def set_chess960_pos(self, scharnagl: int) -> None:
 
     def chess960_pos(self, *, ignore_turn: bool = False, ignore_castling: bool = False, ignore_counters: bool = True) -> Optional[int]:
         """
-        Gets the Chess960 starting position index between 0 and 956,
+        Gets the Chess960 starting position index between 0 and 959,
         or ``None`` if the current position is not a Chess960 starting
         position.