diff --git a/css-display/Overview.bs b/css-display/Overview.bs
index ffe15334cf4..21acbb6df5f 100644
--- a/css-display/Overview.bs
+++ b/css-display/Overview.bs
@@ -302,7 +302,7 @@ Outer Display Roles for Flow Layout: the ''block'', ''inline'', and ''run-in'' k
 	the element's <a>inner display type</a> defaults to ''flow''.
 
 <h3 id="inner-model">
-Inner Display Layout Models: the ''flow'', ''flow-root'', ''table'', ''grid'', and ''ruby'' keywords</h3>
+Inner Display Layout Models: the ''flow'', ''flow-root'', ''table'', ''flex'', ''grid'', and ''ruby'' keywords</h3>
 
 	The <<display-inside>> keywords specify the element's <a>inner display type</a>,
 	which defines the type of formatting context that lays out its contents