diff --git a/How-to-flash-the-Arduino.md b/How-to-flash-the-Arduino.md
index a5d9a80..2f13a8c 100644
--- a/How-to-flash-the-Arduino.md
+++ b/How-to-flash-the-Arduino.md
@@ -33,7 +33,7 @@ After the successful installation of the driver, there should be a CH340 entry i
 
 ![image](https://dl.dropboxusercontent.com/s/7o4wmh2rn4g2der/portableardu4.jpg?dl=1)  
 
-**7)** Next you need to go to the Cart_Reader.ino tab and define your hardware version by removing the // in front of your version. You can also remove  // before #define enable_XXX to enable add-on modules you need.      
+**7)** Next you need to go to the config.h tab(earlier version have this in Cart_Reader.ino) and define your hardware version by removing the // in front of your version. You can also remove  // before #define enable_XXX to enable add-on modules you need.      
 
 ![image](https://dl.dropboxusercontent.com/s/8kajcakxeghsben/choosemoduleshw.jpg?dl=1)