diff --git a/change_mode.py b/change_mode.py
index 31bc0ac7..daa6e9c8 100644
--- a/change_mode.py
+++ b/change_mode.py
@@ -8,6 +8,9 @@ import RPi.GPIO as GPIO
 from RPi.GPIO import output
 from subprocess import call
 
+powerPin = 16
+txLed = 27
+
 if __name__ == "__main__":
 	mode = 'b'
 	if (len(sys.argv)) > 1: