diff --git a/tomcat-9.0-CVE-2022-23181.patch b/tomcat-9.0-CVE-2022-23181.patch
index 79623ca..db05ed5 100644
--- a/tomcat-9.0-CVE-2022-23181.patch
+++ b/tomcat-9.0-CVE-2022-23181.patch
@@ -1,3 +1,13 @@
+From 1385c624b4a1e994426e810075c850edc38a700e Mon Sep 17 00:00:00 2001
+From: Mark Thomas <markt@apache.org>
+Date: Wed, 12 Jan 2022 11:11:29 +0000
+Subject: [PATCH] Make calculation of session storage location more robust
+
+---
+ java/org/apache/catalina/session/FileStore.java | 5 +++--
+ webapps/docs/changelog.xml                      | 4 ++++
+ 2 files changed, 7 insertions(+), 2 deletions(-)
+
 Index: apache-tomcat-9.0.43-src/java/org/apache/catalina/session/FileStore.java
 ===================================================================
 --- apache-tomcat-9.0.43-src.orig/java/org/apache/catalina/session/FileStore.java