diff --git a/nova/api/openstack/compute/schemas/servers.py b/nova/api/openstack/compute/schemas/servers.py
index a56e9f2863..255d25e092 100644
--- a/nova/api/openstack/compute/schemas/servers.py
+++ b/nova/api/openstack/compute/schemas/servers.py
@@ -906,7 +906,7 @@ _server_response = {
         'addresses': {
             'type': 'object',
             'patternProperties': {
-                '^.+$': {
+                '^.*$': {
                     'type': 'array',
                     'items': {
                         'type': 'object',