diff --git a/ansible/action_plugins/tenks_update_state.py b/ansible/action_plugins/tenks_update_state.py
index 1846664..4dd82ab 100644
--- a/ansible/action_plugins/tenks_update_state.py
+++ b/ansible/action_plugins/tenks_update_state.py
@@ -34,7 +34,7 @@ class ActionModule(ActionBase):
             * Generating indices for physical networks for each hypervisor.
             * Scheduling specifications of nodes by type onto hypervisors.
 
-        The following task vars are accepted:
+        The following task arguments are accepted:
             :hypervisor_vars: A dict of hostvars for each hypervisor, keyed
                               by hypervisor hostname. Required.
             :specs: A list of node specifications to be instantiated. Required.
diff --git a/ansible/schedule.yml b/ansible/schedule.yml
index 9507e19..2ec92b3 100644
--- a/ansible/schedule.yml
+++ b/ansible/schedule.yml
@@ -35,9 +35,11 @@
     - name: Get updated state
       tenks_update_state:
         hypervisor_vars: "{{ hypervisor_vars }}"
+        node_name_prefix: "{{ node_name_prefix | default(omit) }}"
         node_types: "{{ node_types }}"
         specs: "{{ specs }}"
         state: "{{ current_state | default(omit) }}"
+        vol_name_prefix: "{{ vol_name_prefix | default(omit) }}"
       register: new_state
 
     - name: Write new state to file