diff --git a/takway/board/orangepi.py b/takway/board/orangepi.py
index 39fad13..0aa82db 100644
--- a/takway/board/orangepi.py
+++ b/takway/board/orangepi.py
@@ -1,6 +1,7 @@
 from takway.board.base_hd import BaseHardware
 import threading
 from datetime import datetime
+import time
 try:
     import wiringpi
     from wiringpi import GPIO