diff --git a/step1-06/demo/src/components/TodoList.tsx b/step1-06/demo/src/components/TodoList.tsx
index aeacb25..04987b2 100644
--- a/step1-06/demo/src/components/TodoList.tsx
+++ b/step1-06/demo/src/components/TodoList.tsx
@@ -3,7 +3,7 @@ import { TodoListItem } from './TodoListItem';
 
 export class TodoList extends React.Component<any, any> {
   render() {
-    const { filter, todos } = this.props;
+    const { filter, todos = {} } = this.props;
 
     // filteredTodos returns an array of filtered todo keys [01,02,03]
     const filteredTodos = Object.keys(todos).filter(id => {