diff --git a/resize-observer-1/Overview.bs b/resize-observer-1/Overview.bs
index a1b146f06ea..e14e7670cf7 100644
--- a/resize-observer-1/Overview.bs
+++ b/resize-observer-1/Overview.bs
@@ -393,6 +393,11 @@ Content rect for the <a>SVGGraphicsElement</a>s without CSS layout boxes is a re
 
 <h3 id="algorithms">Algorithms</h3>
 
+<p class="note">
+The following algorithms are invoked as a part of [=update the rendering=] in the html spec:
+<a>gather active resize observations at depth</a>, <a>has active resize observations</a>, <a>has skipped resize observations</a>, <a>broadcast active resize observations</a> and <a>deliver resize loop error notification</a>.
+</p>
+
 <h4 id="gather-active-observations-h">Gather active resize observations at depth</h4>
 
 It computes all active resize observations for a |document|. To <dfn>gather active resize observations at depth</dfn>, run these steps: