diff --git a/app/src/main/java/io/legado/app/ui/main/my/MyFragment.kt b/app/src/main/java/io/legado/app/ui/main/my/MyFragment.kt
index 0d8bb010d..8261fa726 100644
--- a/app/src/main/java/io/legado/app/ui/main/my/MyFragment.kt
+++ b/app/src/main/java/io/legado/app/ui/main/my/MyFragment.kt
@@ -65,9 +65,8 @@ class MyFragment : BaseFragment(R.layout.fragment_my_config) {
         override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
             putPrefBoolean(PreferKey.webService, WebService.isRun)
             addPreferencesFromResource(R.xml.pref_main)
-            val webServicePre = findPreference<SwitchPreference>(PreferKey.webService)
             observeEventSticky<String>(EventBus.WEB_SERVICE) {
-                webServicePre?.let {
+                findPreference<SwitchPreference>(PreferKey.webService)?.let {
                     it.isChecked = WebService.isRun
                     it.summary = if (WebService.isRun) {
                         WebService.hostAddress