diff --git a/projects/ucap-webmessenger-app/src/app/store/setting/native/effects.ts b/projects/ucap-webmessenger-app/src/app/store/setting/native/effects.ts
index cd60092c..dd3e3f89 100644
--- a/projects/ucap-webmessenger-app/src/app/store/setting/native/effects.ts
+++ b/projects/ucap-webmessenger-app/src/app/store/setting/native/effects.ts
@@ -41,6 +41,8 @@ export class Effects {
         ofType(changeZoom),
         map(action => action.zoom),
         tap(zoom => {
+          zoom = zoom || 100;
+
           const appUserInfo = this.localStorageService.encGet<AppUserInfo>(
             KEY_APP_USER_INFO,
             environment.customConfig.appKey