diff --git a/src/teletext/ui.py b/src/teletext/ui.py
index e22348a..baf276a 100644
--- a/src/teletext/ui.py
+++ b/src/teletext/ui.py
@@ -8,7 +8,7 @@ from PyQt6.QtWidgets import (
 from PyQt6.QtGui import QAction, QKeyEvent, QPainter, QBrush, QColor
 from PyQt6.QtCore import Qt, QRect, QTimer
 
-from .io import load_t42, save_t42, save_tti
+from .io import load_t42, save_t42, save_tti, decode_hamming_8_4, encode_hamming_8_4
 from .renderer import TeletextCanvas, create_blank_packet
 import copy
 import sys