diff --git a/defaults/main.yml b/defaults/main.yml
index becf6b2f..b3b0065e 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -27,6 +27,7 @@ lxc_hosts_pip_package_state: "latest"
 lxc_architecture_mapping:
   x86_64: amd64
   ppc64le: ppc64el
+  s390x: s390x
 
 # Set the volume size in gigabytes for the machine image caches.
 lxc_host_machine_volume_size: 16
diff --git a/releasenotes/notes/ubuntu-s390x-0a561bc69354d48a.yaml b/releasenotes/notes/ubuntu-s390x-0a561bc69354d48a.yaml
new file mode 100644
index 00000000..06c0412d
--- /dev/null
+++ b/releasenotes/notes/ubuntu-s390x-0a561bc69354d48a.yaml
@@ -0,0 +1,3 @@
+---
+features:
+  - Add support for Ubuntu on IBM z Systems (s390x).