diff --git a/index.html b/index.html
index 93028a2a7..60e7b87c2 100644
--- a/index.html
+++ b/index.html
@@ -2342,7 +2342,7 @@ <h4>Enveloped Verifiable Credentials</h4>
 with the `verifiableCredential` property in a <a>verifiable presentation</a>.
 The `@context` value of the object MUST follow all of the "MUST" statements in
 Section <a href="#contexts"></a>. The `id` value of the object MUST be a `data:`
-URL that expresses a secured <a>verifiable credential</a> using an enveloping
+URL [[RFC2397]] that expresses a secured <a>verifiable credential</a> using an enveloping
 security scheme, such as [[[VC-JOSE-COSE]]] [[VC-JOSE-COSE]]. The `type` value
 of the object MUST be `EnvelopedVerifiableCredential`.
             </dd>