diff --git a/src/adafruit_blinka/microcontroller/generic_linux/lgpio_pin.py b/src/adafruit_blinka/microcontroller/generic_linux/lgpio_pin.py
index 3097b02b..948af0e3 100644
--- a/src/adafruit_blinka/microcontroller/generic_linux/lgpio_pin.py
+++ b/src/adafruit_blinka/microcontroller/generic_linux/lgpio_pin.py
@@ -23,7 +23,8 @@ def _get_gpiochip():
                 "raspberrypi,bcm2835-gpio",
                 "raspberrypi,bcm2711-gpio",
             }:
-                return lgpio.gpiochip_open(int(dev.name[-1]))
+                chip_id = int(dev.name[len("gpiochip") :])
+                return lgpio.gpiochip_open(chip_id)
     # return chip0 as a fallback
     return lgpio.gpiochip_open(0)