diff --git a/brmdoor_nfc.config.sample b/brmdoor_nfc.config.sample
index cc71b47..ce6b46f 100644
--- a/brmdoor_nfc.config.sample
+++ b/brmdoor_nfc.config.sample
@@ -20,4 +20,4 @@ unlocker = UnlockerWiringPi
 # Config for wiringPi-based unlocker
 # lock_pin - which pin needs to be pulled high to disengage the lock
 [UnlockerWiringPi]
-lock_pin = 18
+lock_pin = 17
diff --git a/unlocker.py b/unlocker.py
index e7fcf54..08dbaa5 100644
--- a/unlocker.py
+++ b/unlocker.py
@@ -29,6 +29,7 @@ class UnlockerWiringPi(Unlocker):
 
 	def __init__(self, config):
 		Unlocker.__init__(self, config)
+                wiringpi.wiringPiSetupGpio() # pin numbers follow P1 GPIO header
 		self.lockPin = self.config.getint("UnlockerWiringPi", "lock_pin")
 		wiringpi.pinMode(self.lockPin, 1) #output