diff --git a/mqtt/motionSensor.py b/mqtt/motionSensor.py
index 59a3b78..0cfc4dd 100644
--- a/mqtt/motionSensor.py
+++ b/mqtt/motionSensor.py
@@ -27,7 +27,7 @@ for proc in psutil.process_iter():
 #12 is the pin number
 pir_sensor = 12
 
-GPIO.setmode(GPIO.BOARD)
+GPIO.setmode(GPIO.BCM)
 
 GPIO.setup(pir_sensor, GPIO.IN)