diff --git a/docs/pages/xy-grid.md b/docs/pages/xy-grid.md
index 481791f60d..71f5e5cce9 100644
--- a/docs/pages/xy-grid.md
+++ b/docs/pages/xy-grid.md
@@ -42,7 +42,8 @@ These are:
   $block-grid: true,
   $collapse: true,
   $offset: true,
-  $vertical-grid: true
+  $vertical-grid: true,
+  $frame-grid: true
 );
 ```
 ---