diff --git a/awx/api/views.py b/awx/api/views.py
index af32ffd0a9..96c3bf396e 100644
--- a/awx/api/views.py
+++ b/awx/api/views.py
@@ -1637,7 +1637,7 @@ class InventoryScriptView(RetrieveAPIView):
                 group_children.append(from_group_name)
 
             # Now use in-memory maps to build up group info.
-            for group in obj.groups:
+            for group in obj.groups.all():
                 group_info = OrderedDict()
                 group_info['hosts'] = group_hosts_map.get(group.id, [])
                 group_info['children'] = group_children_map.get(group.id, [])