diff --git a/roles/tripleo-inventory/templates/get-overcloud-nodes.py.j2 b/roles/tripleo-inventory/templates/get-overcloud-nodes.py.j2
index fe7f06b3f..37634d48e 100644
--- a/roles/tripleo-inventory/templates/get-overcloud-nodes.py.j2
+++ b/roles/tripleo-inventory/templates/get-overcloud-nodes.py.j2
@@ -30,7 +30,9 @@ else:
     nova = client.Client(2,
                          os.environ.get("OS_USERNAME"),
                          os.environ.get("OS_PASSWORD"),
-                         project_name=os.environ.get("OS_TENANT_NAME"),
+                         project_name=os.environ.get(
+                             "OS_TENANT_NAME",
+                             os.environ.get("OS_PROJECT_NAME")),
                          auth_url=os.environ.get("OS_AUTH_URL"))
 
 oc_servers = {server.name: server.networks['ctlplane'][0]