Add NEWS item.
diff --git a/Misc/NEWS b/Misc/NEWS
index 08552bf..5129164 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -202,6 +202,8 @@
 Library
 -------
 
+- Issue #4572: added SEEK_* symbolic constants to io module.
+
 - Issue #1665206 (partially): Move imports in cgitb to the top of the module
   instead of performing them in functions. Helps prevent import deadlocking in
   threads.