diff --git a/services/distributeddataservice/service/backup/src/backup_manager.cpp b/services/distributeddataservice/service/backup/src/backup_manager.cpp
index bec2b5d13d352cc0cb8114ac6116605d3196e80f..73acc1bdf4a75f6168402086bcface4b2d045579 100644
--- a/services/distributeddataservice/service/backup/src/backup_manager.cpp
+++ b/services/distributeddataservice/service/backup/src/backup_manager.cpp
@@ -281,7 +281,8 @@ BackupManager::ClearType BackupManager::GetClearType(const StoreMetaData &meta)
 
 void BackupManager::CopyFile(const std::string &oldPath, const std::string &newPath, bool isCreate)
 {
-    std::fstream fin, fout;
+    std::fstream fin;
+    std::fstream fout;
     if (!IsFileExist(oldPath)) {
         return;
     }