Closes #10650: Deprecate the watchexp parameter of Decimal.quantize().
diff --git a/Doc/library/decimal.rst b/Doc/library/decimal.rst
index 3fa006b..4a2b2d0 100644
--- a/Doc/library/decimal.rst
+++ b/Doc/library/decimal.rst
@@ -737,6 +737,11 @@
resulting exponent is greater than :attr:`Emax` or less than
:attr:`Etiny`.
+ .. deprecated:: 3.3
+ *watchexp* is an implementation detail from the pure Python version
+ and is not present in the C version. It will be removed in version
+ 3.4, where it defaults to ``True``.
+
.. method:: radix()
Return ``Decimal(10)``, the radix (base) in which the :class:`Decimal`