diff --git a/apps/example-todo-app/pages/api/todo/add.ts b/apps/example-todo-app/pages/api/todo/add.ts
index 4f7c77ee3..7a5ea21bd 100644
--- a/apps/example-todo-app/pages/api/todo/add.ts
+++ b/apps/example-todo-app/pages/api/todo/add.ts
@@ -20,7 +20,7 @@ export const jsonBody = z.object({
     ---
     This is an unused, deprecated field.
   `),
-  description: z.string().nullable(),
+  description: z.string().nullable().optional(),
 })
 
 export const route_spec = checkRouteSpec({