diff --git a/index.bs b/index.bs
index 1c6cd897..d0664239 100644
--- a/index.bs
+++ b/index.bs
@@ -14042,6 +14042,8 @@ The characteristics of a namespace object are described in [[#namespace-object]]
     1.  Return |namespaceObject|.
 </div>
 
+The [=class string=] of a [=namespace object=] is the [=namespace=]’s [=identifier=].
+
 
 <h3 id="es-exceptions">Exceptions</h3>