diff --git a/Doc/library/enum.rst b/Doc/library/enum.rst
index 3d0747bf5c7faf..6e2872b9c70731 100644
--- a/Doc/library/enum.rst
+++ b/Doc/library/enum.rst
@@ -560,6 +560,8 @@ Data Types
          >>> len(white)
          3
 
+      .. versionadded:: 3.11
+
    .. method:: __bool__(self):
 
       Returns *True* if any members in flag, *False* otherwise::