diff --git a/index.html b/index.html
index fc57451..3d38a18 100644
--- a/index.html
+++ b/index.html
@@ -1205,7 +1205,7 @@ <h4>Same-origin restriction</h4>
         </p>
         <p>
           The feature can be extended to third-party contexts such as iframes only by a
-          <a href="declared policy">declared policy</a>.
+          <a href="https://www.w3.org/TR/permissions-policy/#declared-policy">declared policy</a>.
         </p>
       </section>
     </p>