diff --git a/app/src/main/java/io/legado/app/ui/book/read/ReadBookActivity.kt b/app/src/main/java/io/legado/app/ui/book/read/ReadBookActivity.kt
index 6e63da661..29b253c7a 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/ReadBookActivity.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/ReadBookActivity.kt
@@ -182,6 +182,7 @@ class ReadBookActivity : BaseReadBookActivity(),
     override fun onWindowFocusChanged(hasFocus: Boolean) {
         super.onWindowFocusChanged(hasFocus)
         upSystemUiVisibility()
+        binding.readMenu.upBrightnessState()
     }
 
     override fun onConfigurationChanged(newConfig: Configuration) {