diff --git a/tts_yaml_unpacker.py b/tts_yaml_unpacker.py
index 624bee7..03af549 100755
--- a/tts_yaml_unpacker.py
+++ b/tts_yaml_unpacker.py
@@ -97,8 +97,12 @@ def unpackJson(json_file, output_name):
     with open(json_file) as f:
         data = json.load(f)
 
+    if 'ObjectStates' in data:
+        prop = 'ObjectStates'
+    else:
+        prop = 'ContainedObjects'
     recursivelyUnpackObject(
-        '', data, subobject_prop='ObjectStates', base_name=output_name)
+        '', data, subobject_prop=prop, base_name=output_name)
 
 
 def packYaml(yaml_file, output_json_file):