diff --git a/gallery/src/demos/demo-hui-grid-and-stack-card.ts b/gallery/src/demos/demo-hui-grid-and-stack-card.ts
index 8beb16a20d..e22b5c20d4 100644
--- a/gallery/src/demos/demo-hui-grid-and-stack-card.ts
+++ b/gallery/src/demos/demo-hui-grid-and-stack-card.ts
@@ -108,6 +108,7 @@ const CONFIGS = [
     heading: "Columns 4",
     config: `
 - type: grid
+  columns: 4
   cards:
     - type: entity
       entity: light.kitchen_lights