diff --git a/src/common/protocol/bytestream.py b/src/common/protocol/bytestream.py
index ab71f91f9..61acdc8ba 100644
--- a/src/common/protocol/bytestream.py
+++ b/src/common/protocol/bytestream.py
@@ -344,7 +344,6 @@ class ConnectionSocks5Bytestream(ConnectionBytestream):
             file_props['request-id'] = 'id_' + file_props['sid']
             iq.setID(file_props['request-id'])
             query = iq.setTag('query', namespace=xmpp.NS_BYTESTREAM)
-            query.setAttr('mode', 'plain')
             query.setAttr('sid', file_props['sid'])
 
             self._add_addiditional_streamhosts_to_query(query, file_props)