diff --git a/Misc/NEWS b/Misc/NEWS
index 82b1769..bbe632c 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -107,6 +107,8 @@
 Library
 -------
 
+- Issue #15222: Insert blank line after each message in mbox mailboxes
+
 - Issue #16013: Fix CSV Reader parsing issue with ending quote characters.
   Patch by Serhiy Storchaka.