diff --git a/dsmr_parser/clients/filereader.py b/dsmr_parser/clients/filereader.py
index c2a35cb..f4ed6fd 100644
--- a/dsmr_parser/clients/filereader.py
+++ b/dsmr_parser/clients/filereader.py
@@ -1,4 +1,5 @@
 import logging
+import fileinput
 
 from dsmr_parser.clients.telegram_buffer import TelegramBuffer
 from dsmr_parser.exceptions import ParseError, InvalidChecksumError