diff --git a/defaults/main.yml b/defaults/main.yml
index e7b48624..75fe5b85 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -483,7 +483,7 @@ neutron_local_ip: 127.0.0.1
 neutron_uca_enable: True
 # Ubuntu Cloud Archive mirror URL
 uca_apt_repo_url: "http://ubuntu-cloud.archive.canonical.com/ubuntu"
-uca_apt_source_list_filename: "ubuntu_cloud_archive_canonical_com_ubuntu"
+#uca_apt_source_list_filename: "ubuntu_cloud_archive_canonical_com_ubuntu"
 
 # When running in an AIO, we need to implement an iptables rule in any
 # neutron_agent containers to that ensure instances can communicate with
diff --git a/tasks/neutron_install.yml b/tasks/neutron_install.yml
index 2eb5f310..d118dac6 100644
--- a/tasks/neutron_install.yml
+++ b/tasks/neutron_install.yml
@@ -36,7 +36,7 @@
     repo: "{{ uca_repo }}"
     state: present
     update_cache: yes
-    filename: "{{ uca_apt_source_list_filename }}"
+    filename: "{{ uca_apt_source_list_filename | default(omit) }}"
   register: neutron_uca_add_repo
   when:
     - neutron_uca_enable