diff --git a/css-anchor-position-1/Overview.bs b/css-anchor-position-1/Overview.bs
index 038f92898b5..86039a2fdbe 100644
--- a/css-anchor-position-1/Overview.bs
+++ b/css-anchor-position-1/Overview.bs
@@ -414,6 +414,7 @@ for all [=anchor functions=] on the element,
 allowing multiple elements to use the same set of [=anchor functions=]
 (and [=position options lists=]!)
 while changing which [=anchor element=] each is referring to.
+'position-anchor' is a [=reset-only sub-property=] of 'position'.
 
 The [=target anchor element=] selected by the [=default anchor specifier=]
 (if one exists)