diff --git a/Lecture 01/CreditCardValidation/CreditCard.hs b/Lecture 01/CreditCardValidation/CreditCard.hs
index cb399ad..db9bf8d 100644
--- a/Lecture 01/CreditCardValidation/CreditCard.hs	
+++ b/Lecture 01/CreditCardValidation/CreditCard.hs	
@@ -1,4 +1,4 @@
-
+module CreditCard where
 
 lastDigit :: Integer -> Integer
 lastDigit n = n `mod` 10