diff --git a/spec/index.bs b/spec/index.bs
index 916c0ce73..4f9a01c1b 100644
--- a/spec/index.bs
+++ b/spec/index.bs
@@ -1380,8 +1380,8 @@ following steps. This returns a <a spec=url for=/>URL</a> or failure.
     1. If |manifestUrl| is failure, return failure.
     1. If |requireSameOrigin| and |manifestUrl| is not [=same origin=] with |configUrl|, return
         failure.
-    1. If |requireSameOrigin| is false and |manifestUrl|'s <a spec=url>domain</a> is not equal to
-        |configUrl|'s, return failure.
+    1. If |requireSameOrigin| is false and |manifestUrl|'s [=url/host=]'s [=host/registrable domain=]
+        is not equal to |configUrl|'s, return failure.
     1. If |manifestUrl| is not a [=potentially trustworthy URL=], return failure.
     1. Return |manifestUrl|.
 </div>