diff --git a/css-conditional-5/Overview.bs b/css-conditional-5/Overview.bs
index e0c37581020..cc6c9790df8 100644
--- a/css-conditional-5/Overview.bs
+++ b/css-conditional-5/Overview.bs
@@ -589,6 +589,7 @@ Naming Query Containers: the 'container-name' property</h3>
 	specifies a list of <dfn export lt="query container name">query container names</dfn>.
 	These names can be used by ''@container'' rules
 	to filter which [=query containers=] are targeted.
+	Container names are not [=tree-scoped names=].
 
 	<dl dfn-for=container-name dfn-type=value>
 	<dt><dfn>none</dfn>