diff --git a/app/src/main/java/io/legado/app/constant/PreferKey.kt b/app/src/main/java/io/legado/app/constant/PreferKey.kt
index 0aa00ac2a..2e385f9ca 100644
--- a/app/src/main/java/io/legado/app/constant/PreferKey.kt
+++ b/app/src/main/java/io/legado/app/constant/PreferKey.kt
@@ -52,6 +52,7 @@ object PreferKey {
     const val replaceEnableDefault = "replaceEnableDefault"
     const val showBrightnessView = "showBrightnessView"
     const val autoClearExpired = "autoClearExpired"
+    const val autoChangeSource = "autoChangeSource"
 
     const val cPrimary = "colorPrimary"
     const val cAccent = "colorAccent"
diff --git a/app/src/main/java/io/legado/app/help/AppConfig.kt b/app/src/main/java/io/legado/app/help/AppConfig.kt
index 05a180006..82afe6a8b 100644
--- a/app/src/main/java/io/legado/app/help/AppConfig.kt
+++ b/app/src/main/java/io/legado/app/help/AppConfig.kt
@@ -120,9 +120,11 @@ object AppConfig {
             App.INSTANCE.putPrefInt(PreferKey.barElevation, value)
         }
 
-    val autoChangeSource: Boolean get() = App.INSTANCE.getPrefBoolean("autoChangeSource", true)
+    val autoChangeSource: Boolean
+        get() = App.INSTANCE.getPrefBoolean(PreferKey.autoChangeSource, true)
 
-    val readBodyToLh: Boolean get() = App.INSTANCE.getPrefBoolean(PreferKey.readBodyToLh, true)
+    val readBodyToLh: Boolean
+        get() = App.INSTANCE.getPrefBoolean(PreferKey.readBodyToLh, true)
 
     fun upReplaceEnableDefault() {
         replaceEnableDefault =