diff --git a/doc/source/whatsnew/v2.2.0.rst b/doc/source/whatsnew/v2.2.0.rst
index 7a0075ab88a3a..03d00f4b30316 100644
--- a/doc/source/whatsnew/v2.2.0.rst
+++ b/doc/source/whatsnew/v2.2.0.rst
@@ -246,7 +246,7 @@ These are bug fixes that might have notable behavior changes.
 
 In previous versions of pandas, :func:`merge` and :meth:`DataFrame.join` did not
 always return a result that followed the documented sort behavior. pandas now
-follows the documented sort behavior in merge and join operations (:issue:`54611`).
+follows the documented sort behavior in merge and join operations (:issue:`54611`, :issue:`56426`).
 
 As documented, ``sort=True`` sorts the join keys lexicographically in the resulting
 :class:`DataFrame`. With ``sort=False``, the order of the join keys depends on the