diff --git a/VendServer/DispenseInterface.py b/VendServer/DispenseInterface.py
index 81a3f06b03d5f92ae5bf9b721da47f8537d555a6..7af3653f2b1f90901062453070f6d1f810d44568 100644
--- a/VendServer/DispenseInterface.py
+++ b/VendServer/DispenseInterface.py
@@ -28,6 +28,12 @@ class DispenseInterface(object):
 	def authMifare(cardId):
 		pass
 
+	"""
+	Add a MIFARE card for this user
+	"""
+	def addCard(self, cardId):
+		pass
+
 	"""
 	Check if creating the user worked correctly.
 	"""