diff --git a/pkg/cidata/schemas/Makefile b/pkg/cidata/schemas/Makefile
index ebaec7727c8..7807fb8e9fd 100644
--- a/pkg/cidata/schemas/Makefile
+++ b/pkg/cidata/schemas/Makefile
@@ -5,3 +5,4 @@ all: versions.schema.cloud-config.json schema-cloud-config-v1.json
 
 %.json:
 	curl -fsSLO https://raw.githubusercontent.com/canonical/cloud-init/$(CLOUD_INIT_VERSION)/cloudinit/config/schemas/$@
+	if [ "$@" = "schema-cloud-config-v1.json" ]; then patch -N $@ ssh-authorized-keys.patch; fi
diff --git a/pkg/cidata/schemas/schema-cloud-config-v1.json b/pkg/cidata/schemas/schema-cloud-config-v1.json
index ff61dcaa60b..5b900b0d1a3 100644
--- a/pkg/cidata/schemas/schema-cloud-config-v1.json
+++ b/pkg/cidata/schemas/schema-cloud-config-v1.json
@@ -361,6 +361,22 @@
           },
           "minItems": 1
         },
+	"ssh-authorized-keys": {
+          "allOf": [
+            {
+              "type": "array",
+              "items": {
+                "type": "string"
+              },
+              "minItems": 1
+            },
+            {
+              "deprecated": true,
+              "deprecated_version": "18.3",
+              "deprecated_description": "Use ``ssh_authorized_keys`` instead."
+            }
+          ]
+        },
         "ssh_import_id": {
           "description": "List of ssh ids to import for user. Can not be combined with ``ssh_redirect_user``. See the man page[1] for more details. [1] https://manpages.ubuntu.com/manpages/noble/en/man1/ssh-import-id.1.html",
           "type": "array",
diff --git a/pkg/cidata/schemas/ssh-authorized-keys.patch b/pkg/cidata/schemas/ssh-authorized-keys.patch
new file mode 100644
index 00000000000..8d1afd244c8
--- /dev/null
+++ b/pkg/cidata/schemas/ssh-authorized-keys.patch
@@ -0,0 +1,27 @@
+diff --git a/cloudinit/config/schemas/schema-cloud-config-v1.json b/cloudinit/config/schemas/schema-cloud-config-v1.json
+index ff61dcaa6..73e54ebaf 100644
+--- a/cloudinit/config/schemas/schema-cloud-config-v1.json
++++ b/cloudinit/config/schemas/schema-cloud-config-v1.json
+@@ -361,6 +361,22 @@
+           },
+           "minItems": 1
+         },
++	"ssh-authorized-keys": {
++          "allOf": [
++            {
++              "type": "array",
++              "items": {
++                "type": "string"
++              },
++              "minItems": 1
++            },
++            {
++              "deprecated": true,
++              "deprecated_version": "18.3",
++              "deprecated_description": "Use ``ssh_authorized_keys`` instead."
++            }
++          ]
++        },
+         "ssh_import_id": {
+           "description": "List of ssh ids to import for user. Can not be combined with ``ssh_redirect_user``. See the man page[1] for more details. [1] https://manpages.ubuntu.com/manpages/noble/en/man1/ssh-import-id.1.html",
+           "type": "array",