diff --git a/README.md b/README.md
index f61de92..51ced2a 100644
--- a/README.md
+++ b/README.md
@@ -16,6 +16,7 @@ The following code will read a tag from the MFRC522
 from time import sleep
 import sys
 from mfrc522 import SimpleMFRC522
+import RPi.GPIO as GPIO
 reader = SimpleMFRC522()
 
 try: