diff --git a/spec.bs b/spec.bs
index a27bcf81b..47e07536e 100644
--- a/spec.bs
+++ b/spec.bs
@@ -598,7 +598,7 @@ The <dfn for=Navigator method>leaveAdInterestGroup(group)</dfn> method steps are
 1. If |group| [=map/is empty=]:
   1. Let |instance| be |global|'s [=Window/browsing context=]'s
     [=browsing context/fenced frame config instance=].
-  1. If |instance| is null, [=exception/throw=] a {{TypeError}}.
+  1. If |instance| is null, then return.
   1. Let |interestGroup| be |instance|'s [=fenced frame config instance/interest group descriptor=].
   1. Run these steps [=in parallel=]:
     1. [=Queue a global task=] on [=DOM manipulation task source=], given |global|, to [=resolve=]