diff --git a/index.bs b/index.bs
index f064a778..3449ebda 100644
--- a/index.bs
+++ b/index.bs
@@ -6402,6 +6402,19 @@ the ECMAScript runtime. The handle is only valid in a specific [=Realm=].
 Each ECMAScript [=Realm=] has a corresponding <dfn>handle object map</dfn>. This is a
 strong [=/map=] from handle ids to their corresponding objects.
 
+#### The script.InternalId Type #### {#type-script-InternalId}
+
+[=Remote end definition=] and [=local end definition=]
+
+<pre class="cddl remote-cddl local-cddl">
+script.InternalId = text;
+</pre>
+
+The <code>script.InternalId</code> type represents the id of 
+a previously serialized <code>script.RemoteValue</code> during
+[=serialize as a remote value|serialization=].
+
+
 #### The script.LocalValue Type #### {#type-script-LocalValue}
 
 [=Remote end definition=]
@@ -7149,8 +7162,6 @@ script.RemoteValue = (
   script.WindowProxyRemoteValue
 )
 
-script.InternalId = text;
-
 script.ListRemoteValue = [*script.RemoteValue];
 
 script.MappingRemoteValue = [*[(script.RemoteValue / text), script.RemoteValue]];