diff --git a/docs/index.bs b/docs/index.bs
index bd5df905..b3b38c26 100644
--- a/docs/index.bs
+++ b/docs/index.bs
@@ -132,6 +132,10 @@ spec: rfc7231; urlPrefix: https://datatracker.ietf.org/doc/html/rfc7231
     type: dfn
         text: Vary; url: section-7.1.4
 
+spec: rfc2397; urlPrefix: https://datatracker.ietf.org/doc/html/rfc2397
+    type: dfn
+        text: data: URL; url: section-2
+
 spec: storage; urlPrefix: https://storage.spec.whatwg.org/
     type: dfn
         text: storage key; url: storage-key
@@ -357,7 +361,7 @@ spec: storage; urlPrefix: https://storage.spec.whatwg.org/
       Otherwise, it is set to the [=active service worker=] of the [=environment settings object=] of the last [=set/item=] in the [=worker client=]'s [=/global object=]'s [=owner set=].
     </section>
 
-    Note: [=Window clients=] and [=worker clients=] with a [data: URL](https://datatracker.ietf.org/doc/html/rfc2397#section-2) result in having the [=active service worker=] value of null as their [=/origin=] is an [=opaque origin=]. [=Window clients=] and [=worker clients=] with a [=blob URL=] can inherit the [=active service worker=] of their creator [=/document=] or owner, but if the [=/request=]'s [=request/origin=] is not the [=same origin|same=] as the [=/origin=] of their creator [=/document=] or owner, the [=active service worker=] is set to null.
+    Note: [=Window clients=] and [=worker clients=] with a [=data: URL=] result in having the [=active service worker=] value of null as their [=/origin=] is an [=opaque origin=]. [=Window clients=] and [=worker clients=] with a [=blob URL=] can inherit the [=active service worker=] of their creator [=/document=] or owner, but if the [=/request=]'s [=request/origin=] is not the [=same origin|same=] as the [=/origin=] of their creator [=/document=] or owner, the [=active service worker=] is set to null.
   </section>
 
   <section>