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 d9acbb34e..9e50a6d4c 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
@@ -31,7 +31,7 @@ data class Book(
     var intro: String? = null,                  // 简介内容(书源获取)
     var customIntro: String? = null,            // 简介内容(用户修改)
     var charset: String? = null,                // 自定义字符集名称(仅适用于本地书籍)
-    var type: Int = 0,                          // @BookType
+    var type: Int = 0,                          // 0:text 1:audio
     var group: Int = 1,                         // 自定义分组索引号
     var latestChapterTitle: String? = null,     // 最新章节标题
     var latestChapterTime: Long = System.currentTimeMillis(),            // 最新章节标题更新时间