diff --git a/css-cascade-5/Overview.bs b/css-cascade-5/Overview.bs
index 9afe53cdd0a8..22db317989d1 100644
--- a/css-cascade-5/Overview.bs
+++ b/css-cascade-5/Overview.bs
@@ -1229,7 +1229,7 @@ Cascade Layers</h3>
 	In the same way that [=cascade origins=] provide a balance of power
 	between user and author styles,
 	<dfn export local-lt="layer">cascade layers</dfn> provide a structured way
-	to organize and balance concerns within a single origin.
+	to organize and balance concerns within a single [=origin=] and [=context=].
 	Rules within a single [=cascade layer=] cascade together,
 	without interleaving with style rules outside the layer.