diff --git a/infrastructure-playbooks/purge-cluster.yml b/infrastructure-playbooks/purge-cluster.yml
index 2e8c93afc..67884ed92 100644
--- a/infrastructure-playbooks/purge-cluster.yml
+++ b/infrastructure-playbooks/purge-cluster.yml
@@ -216,6 +216,11 @@
 
   tasks:
 
+  - name: default lvm_volumes if not defined
+    set_fact:
+      lvm_volumes: []
+    when: lvm_volumes is not defined
+
   - name: get osd numbers
     shell: "if [ -d /var/lib/ceph/osd ] ; then ls /var/lib/ceph/osd | sed 's/.*-//' ; fi"
     register: osd_ids