diff --git a/spec.bs b/spec.bs
index 65c1f47..13efd8b 100644
--- a/spec.bs
+++ b/spec.bs
@@ -162,6 +162,7 @@ spec: html; urlPrefix: https://html.spec.whatwg.org/multipage/
       text: navigation params; url: navigation-params
       text: snapshot source snapshot params; url: snapshotting-source-snapshot-params
       text: the navigation must be a replace; url: the-navigation-must-be-a-replace
+      text: set the ongoing navigation; url: set-the-ongoing-navigation
       for: navigation params
         text: response; url: navigation-params-response
         text: navigable; url: navigation-params-navigable
@@ -2188,6 +2189,14 @@ Several APIs specific to fenced frames are defined on the {{Fence}} interface.
      given |topLevelTraversable|.
 </div>
 
+<div algorithm=set-ongoing-navigation-patch>
+  Modify the [=set the ongoing navigation=] algorithm. Add a new step after step 2 that reads:
+  
+  3. If <var ignore>newValue</var> is null, [=in parallel=], [=recalculate the untrusted network
+     status of all fenced frame descendants=] given the <var ignore>navigable</var>'s
+     [=navigable/top-level traversable=].
+</div>
+
 A user agent has an associated <dfn>network revocation nonce set</dfn>, which is a [=set=] of
 [=partition nonces=], and a <dfn>network revocation exemption map</dfn>, which is a [=map=] whose
 [=map/keys=] are [=partition nonces=] and [=map/values=] are [=sets=] of [=URLs=].