diff --git a/MFRC522.py b/MFRC522.py
index 30575bf..b18d0ff 100755
--- a/MFRC522.py
+++ b/MFRC522.py
@@ -104,8 +104,8 @@ class MFRC522:
     
   serNum = []
   
-  def __init__(self,spd=1000000):
-    spi.openSPI(speed=spd)
+  def __init__(self,dev='/dev/spidev0.0',spd=1000000):
+    spi.openSPI(device=dev,speed=spd)
     GPIO.setmode(GPIO.BOARD)
     GPIO.setup(22, GPIO.OUT)
     GPIO.output(self.NRSTPD, 1)
@@ -390,4 +390,4 @@ class MFRC522:
     
     self.Write_MFRC522(self.TxAutoReg, 0x40)
     self.Write_MFRC522(self.ModeReg, 0x3D)
-    self.AntennaOn()
\ No newline at end of file
+    self.AntennaOn()