diff --git a/config.ini b/config.ini
index dc000d2..48f3769 100644
--- a/config.ini
+++ b/config.ini
@@ -4,7 +4,6 @@
 ; Hardware Serial baud rate
 ; Also available in the code as `MONITOR_SPEED`
 monitor_speed = 115200
-NFC_ADDR = 0x28
 
 ; Software Config
 ; note: additionnal flags are added by Platform.io (see total amount in `.vscode/c_cpp_properties.json` in the `defines` section)
@@ -15,3 +14,6 @@ build_flags =
     -D MONITOR_SPEED=${config.monitor_speed}
 ; DO NOT TOUCH --- END
     -D WAITING_WIFI_DELAY=1000
+
+    ; nfc addr
+    -D NFC_ADDR=0x28