diff --git a/Misc/NEWS b/Misc/NEWS
index 9d7ec18..ea3d0cc 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -12,6 +12,9 @@
 Core and Builtins
 -----------------
 
+- Issue #9797: pystate.c wrongly assumed that zero couldn't be a valid
+  thread-local storage key.
+
 - Issue #4947: The write() method of sys.stdout and sys.stderr uses their
   encoding and errors attributes instead of using utf-8 in strict mode, to get
   the same behaviour than the print statement.