diff --git a/css-values-4/Overview.bs b/css-values-4/Overview.bs
index 0104e05faa1..34f6a3e7209 100644
--- a/css-values-4/Overview.bs
+++ b/css-values-4/Overview.bs
@@ -953,7 +953,8 @@ Fragment URLs</h5>
 
 	When matching a ''url()'' with the <a>local url flag</a> set,
 	ignore everything but the URL's fragment,
-	and resolve that fragment against the current document that relative URLs are resolved against.
+	and resolve that fragment against the [=node tree=]
+	of the stylesheet's [=CSSStyleSheet/owner node=].
 	This reference must always be treated as same-document
 	(rather than cross-document).