diff --git a/Misc/NEWS b/Misc/NEWS
index f286561..4169950 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -108,6 +108,9 @@
 Library
 -------
 
+- Issue #4812: add missing underscore prefix to some internal-use-only
+  constants in the decimal module.  (Dec_0 becomes _Dec_0, etc.)
+
 - Issue #4795: inspect.isgeneratorfunction() returns False instead of None when
   the function is not a generator.