diff --git a/roles/ansible-ansible-openshift-ansible/templates/cluster-inventory.j2 b/roles/ansible-ansible-openshift-ansible/templates/cluster-inventory.j2
index e4f982427c..1c25e7f769 100644
--- a/roles/ansible-ansible-openshift-ansible/templates/cluster-inventory.j2
+++ b/roles/ansible-ansible-openshift-ansible/templates/cluster-inventory.j2
@@ -235,9 +235,11 @@ openshift_master_cluster_public_hostname={{openshift_cluster_url}}
 #osm_api_server_args={'max-requests-inflight': ['400']}
 
 # default subdomain to use for exposed routes
+{% if openshift_app_subdomain is defined %}
 {% if openshift_app_subdomain %}
 openshift_master_default_subdomain={{openshift_app_subdomain}}
 {% endif %}
+{% endif %}
 
 # additional cors origins
 #osm_custom_cors_origins=['foo.example.com', 'bar.example.com']