diff --git a/app/src/main/java/io/legado/app/service/help/ReadBook.kt b/app/src/main/java/io/legado/app/service/help/ReadBook.kt
index 4eece2fb3..e8485261c 100644
--- a/app/src/main/java/io/legado/app/service/help/ReadBook.kt
+++ b/app/src/main/java/io/legado/app/service/help/ReadBook.kt
@@ -85,8 +85,10 @@ object ReadBook {
     }
 
     fun upMsg(msg: String?) {
-        this.msg = msg
-        callBack?.upContent()
+        if (this.msg != msg) {
+            this.msg = msg
+            callBack?.upContent()
+        }
     }
 
     fun moveToNextPage() {