diff --git a/actionmailbox/CHANGELOG.md b/actionmailbox/CHANGELOG.md
index fd3af5385c3d9..828e00514de16 100644
--- a/actionmailbox/CHANGELOG.md
+++ b/actionmailbox/CHANGELOG.md
@@ -1,3 +1,9 @@
+*   Fixed ingress controllers' ability to accept emails that contain no UTF-8 encoded parts.
+
+    Fixes #46297.
+
+    *Jan Honza Sterba*
+
 *   Add X-Forwarded-To addresses to recipients.
 
     *Andrew Stewart*