diff --git a/app/src/main/java/io/legado/app/ui/book/read/page/provider/ImageProvider.kt b/app/src/main/java/io/legado/app/ui/book/read/page/provider/ImageProvider.kt
index 5b34852c2..84413b7b8 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/page/provider/ImageProvider.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/page/provider/ImageProvider.kt
@@ -65,7 +65,7 @@ object ImageProvider {
 
     }
 
-    fun getNotRecycled(key: String): Bitmap? {
+    private fun getNotRecycled(key: String): Bitmap? {
         val bitmap = bitmapLruCache.get(key) ?: return null
         if (bitmap.isRecycled) {
             bitmapLruCache.remove(key)