PEP 3151 / issue #12555: reworking the OS and IO exception hierarchy.
diff --git a/Misc/NEWS b/Misc/NEWS
index 9a8e46c..3b0d973 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -10,6 +10,8 @@
 Core and Builtins
 -----------------
 
+- PEP 3151 / issue #12555: reworking the OS and IO exception hierarchy.
+
 - Add internal API for static strings (_Py_identifier et.al.).
 
 - Issue #13063: the Windows error ERROR_NO_DATA (numbered 232 and described