diff --git a/components/modal/demo/service.ts b/components/modal/demo/service.ts
index e5f76c5baa3..a3dbb1e7601 100644
--- a/components/modal/demo/service.ts
+++ b/components/modal/demo/service.ts
@@ -98,7 +98,7 @@ export class NzDemoModalServiceComponent {
       },
       nzFooter: [
         {
-          label: 'change component tilte from outside',
+          label: 'change component title from outside',
           onClick: componentInstance => {
             componentInstance!.title = 'title in inner component is changed';
           }