diff --git a/Doc/library/stdtypes.rst b/Doc/library/stdtypes.rst
index 4f4fc9fba63120..d191e4c5eb8f84 100644
--- a/Doc/library/stdtypes.rst
+++ b/Doc/library/stdtypes.rst
@@ -4415,8 +4415,9 @@ The constructors for both classes work the same:
    return the type of the first operand.  For example: ``frozenset('ab') |
    set('bc')`` returns an instance of :class:`frozenset`.
 
-   The following table lists operations available for :class:`set` that do not
-   apply to immutable instances of :class:`frozenset`:
+   The following mutating operations are available for :class:`set` instances.
+   For :class:`frozenset` instances, only the augmented assignment variants of
+   these operations (``|=``, ``&=``, ``-=``, and ``^=``) are supported.
 
    .. method:: update(*others)
                set |= other | ...