diff --git a/playbooks/ceph-rgw-keystone-setup.yml b/playbooks/ceph-rgw-keystone-setup.yml
index e725c1a53f..50d25eca06 100644
--- a/playbooks/ceph-rgw-keystone-setup.yml
+++ b/playbooks/ceph-rgw-keystone-setup.yml
@@ -17,7 +17,7 @@
   hosts: "{{ openstack_service_setup_host | default('localhost') }}"
   user: root
   vars_files:
-    - "defaults/{{ install_method }}_install.yml"
+    - "defaults/{{ install_method | default('source') }}_install.yml"
   vars:
     ansible_python_interpreter: >-
       {{ openstack_service_setup_host_python_interpreter |
diff --git a/playbooks/healthcheck-infrastructure.yml b/playbooks/healthcheck-infrastructure.yml
index 687848b869..e960bdbbe6 100644
--- a/playbooks/healthcheck-infrastructure.yml
+++ b/playbooks/healthcheck-infrastructure.yml
@@ -102,7 +102,7 @@
   hosts: "{{ openstack_service_setup_host | default('localhost') }}"
   gather_facts: no
   vars_files:
-    - "defaults/{{ install_method }}_install.yml"
+    - "defaults/{{ install_method | default('source') }}_install.yml"
   vars:
     ansible_python_interpreter: "{{ openstack_service_setup_host_python_interpreter | default(ansible_facts['python']['executable']) }}"
   tasks:
diff --git a/playbooks/os-keystone-install.yml b/playbooks/os-keystone-install.yml
index 7ebd03d70b..777695f5c1 100644
--- a/playbooks/os-keystone-install.yml
+++ b/playbooks/os-keystone-install.yml
@@ -23,7 +23,7 @@
   hosts: "{{ openstack_service_setup_host | default('localhost') }}"
   gather_facts: "{{ osa_gather_facts | default(True) }}"
   vars_files:
-    - "defaults/{{ install_method }}_install.yml"
+    - "defaults/{{ install_method | default('source') }}_install.yml"
   become: yes
   tags:
     - openrc