diff --git a/deployment/cinder/cinder-volume-pacemaker-puppet.yaml b/deployment/cinder/cinder-volume-pacemaker-puppet.yaml
index d78268c7f1..8285fe4d17 100644
--- a/deployment/cinder/cinder-volume-pacemaker-puppet.yaml
+++ b/deployment/cinder/cinder-volume-pacemaker-puppet.yaml
@@ -323,7 +323,7 @@ outputs:
             - name: set cinder_volume upgrade node facts in a single-node environment
               set_fact:
                 cinder_volume_short_node_names_upgraded: "{{ cinder_volume_short_node_names }}"
-                cinder_volume_node_names_upgraded: "{{ cinder_volume_node_names }}"
+                cinder_volume_node_names_upgraded: "{{ cinder_volume_node_names | default([]) }}"
                 cacheable: no
               when: groups['cinder_volume'] | length <= 1
             - name: set cinder_volume upgrade node facts from the limit option