diff --git a/doc/admin-guide-cloud/source/compute-images-instances.rst b/doc/admin-guide-cloud/source/compute-images-instances.rst
index 4a4d468e71..c67e46af65 100644
--- a/doc/admin-guide-cloud/source/compute-images-instances.rst
+++ b/doc/admin-guide-cloud/source/compute-images-instances.rst
@@ -217,6 +217,7 @@ these steps:
         "get_metadef_namespaces":"",
         "modify_metadef_namespace":"",
         "add_metadef_namespace":"",
+        "delete_metadef_namespace":"",
 
         "get_metadef_object":"",
         "get_metadef_objects":"",