diff --git a/examples/knx-usb/platformio.ini b/examples/knx-usb/platformio.ini
index 9d561b8..3a1cf04 100644
--- a/examples/knx-usb/platformio.ini
+++ b/examples/knx-usb/platformio.ini
@@ -18,7 +18,7 @@ framework = arduino
 
 ; VID must be changed to some known KNX Manufacturer 
 ; so that the KNX USB interface gets recognized by ETS
-extra_scripts = pre:custom_hwids.py
+extra_scripts = pre:examples/knx-usb/custom_hwids.py
 board_build.usb_product="KNX RF - USB Interface"
 
 lib_deps =