--- a/SftpFileStream.cs	2017-07-09 19:52:55.668978200 +0300
+++ b/SftpFileStream.cs	2017-07-09 19:52:20.082476600 +0300
@@ -555,6 +555,7 @@ namespace Renci.SshNet.Sftp
                     }
 
                     _position = newPosn;
+                    _serverFilePosition = (ulong)newPosn;
                 }
                 return _position;
             }