diff --git a/app/src/main/java/io/legado/app/data/entities/Book.kt b/app/src/main/java/io/legado/app/data/entities/Book.kt
index b51544110..e11193a3c 100644
--- a/app/src/main/java/io/legado/app/data/entities/Book.kt
+++ b/app/src/main/java/io/legado/app/data/entities/Book.kt
@@ -114,7 +114,9 @@ data class Book(
     fun getDisplayIntro() = if (customIntro.isNullOrEmpty()) intro else customIntro
 
     //自定义简介有自动更新的需求时，可通过更新intro再调用upCustomIntro()完成
-    fun upCustomIntro() = customIntro = intro
+    fun upCustomIntro() {
+        customIntro = intro
+    }
 
     fun fileCharset(): Charset {
         return charset(charset ?: "UTF-8")