diff --git a/hidinput.py b/hidinput.py
index 76b0a39..b8f5c6f 100644
--- a/hidinput.py
+++ b/hidinput.py
@@ -21,6 +21,7 @@ NULL = chr(0)
 hiddev = None
 
 def hid_init():
+    global hiddev
     hiddev=open('/dev/hidg0', 'rb+')
 
 def hid_write(data):