diff --git a/Doc/whatsnew/3.12.rst b/Doc/whatsnew/3.12.rst
index 45093122eb7b72..24eb7ae6ac2e1a 100644
--- a/Doc/whatsnew/3.12.rst
+++ b/Doc/whatsnew/3.12.rst
@@ -1112,7 +1112,7 @@ Pending Removal in Python 3.14
   :exc:`DeprecationWarning` to be emitted when it is used.
 
 * Creating immutable types (:c:macro:`Py_TPFLAGS_IMMUTABLETYPE`) with mutable
-  bases using the C API.
+  bases using the C API. (:gh:`97879`).
 
 * Deprecated the *isdst* parameter in :func:`email.utils.localtime`.
   (Contributed by Alan Williams in :gh:`72346`.)