diff --git a/buffet/commands/command_dictionary.cc b/buffet/commands/command_dictionary.cc
index 4f66c7d..2de0f36 100644
--- a/buffet/commands/command_dictionary.cc
+++ b/buffet/commands/command_dictionary.cc
@@ -196,6 +196,8 @@
   const base::DictionaryValue* schema_def = nullptr;
   if (!command_def_json->GetDictionaryWithoutPathExpansion(property_name,
                                                            &schema_def)) {
+    if (base_def)
+      return base_def->Clone();
     return object_schema;
   }