diff --git a/css-text-3/Overview.bs b/css-text-3/Overview.bs
index 8aba704650f1..297d36e4161e 100644
--- a/css-text-3/Overview.bs
+++ b/css-text-3/Overview.bs
@@ -2449,6 +2449,8 @@ Line Breaking Details</h3>
       ''word-break: normal'' and ''overflow-wrap: anywhere'',
       regardless of the actual value of the 'overflow-wrap' property.
       <!-- This is officially sad -->
+      However, the ''word-break/break-word'' keyword is not appropriate for
+      newly-written style sheets. Authors must not use it.
 
       <wpt>
         white-space/pre-wrap-008.html