diff --git a/app/models/manageiq/providers/ansible_tower/inventory/target/automation_manager.rb b/app/models/manageiq/providers/ansible_tower/inventory/target/automation_manager.rb
index 9a2991d9edc..7cb23608c0e 100644
--- a/app/models/manageiq/providers/ansible_tower/inventory/target/automation_manager.rb
+++ b/app/models/manageiq/providers/ansible_tower/inventory/target/automation_manager.rb
@@ -1,7 +1,7 @@
 class ManageIQ::Providers::AnsibleTower::Inventory::Target::AutomationManager < ManagerRefresh::Inventory::Target
   def inventory_groups
     collections[:inventory_groups] ||= ManagerRefresh::InventoryCollection.new(
-      ManageIQ::Providers::AutomationManager::InventoryRootGroup,
+      :model_class    => ManageIQ::Providers::AutomationManager::InventoryRootGroup,
       :association    => :inventory_root_groups,
       :parent         => @root,
       :builder_params => {:manager => @root}
@@ -10,7 +10,7 @@ def inventory_groups
 
   def configured_systems
     collections[:configured_systems] ||= ManagerRefresh::InventoryCollection.new(
-      ManageIQ::Providers::AnsibleTower::AutomationManager::ConfiguredSystem,
+      :model_class    => ManageIQ::Providers::AnsibleTower::AutomationManager::ConfiguredSystem,
       :association    => :configured_systems,
       :parent         => @root,
       :manager_ref    => [:manager_ref],
@@ -20,7 +20,7 @@ def configured_systems
 
   def configuration_scripts
     collections[:configuration_scripts] ||= ManagerRefresh::InventoryCollection.new(
-      ManageIQ::Providers::AnsibleTower::AutomationManager::ConfigurationScript,
+      :model_class    => ManageIQ::Providers::AnsibleTower::AutomationManager::ConfigurationScript,
       :association    => :configuration_scripts,
       :parent         => @root,
       :manager_ref    => [:manager_ref],