diff --git a/ShellPkg/DynamicCommand/TftpDynamicCommand/Tftp.c b/ShellPkg/DynamicCommand/TftpDynamicCommand/Tftp.c
index e2491cd54c..44be6d4e76 100644
--- a/ShellPkg/DynamicCommand/TftpDynamicCommand/Tftp.c
+++ b/ShellPkg/DynamicCommand/TftpDynamicCommand/Tftp.c
@@ -519,6 +519,8 @@ RunTftp (
       goto NextHandle;
     }
 
+    DataSize = FileSize;
+
     if (!EFI_ERROR (ShellFileExists (LocalFilePath))) {
       ShellDeleteFileByName (LocalFilePath);
     }
@@ -539,7 +541,6 @@ RunTftp (
       goto NextHandle;
     }
 
-    DataSize = FileSize;
     Status = ShellWriteFile (FileHandle, &FileSize, Data);
     if (!EFI_ERROR (Status)) {
       ShellStatus = SHELL_SUCCESS;