diff --git a/udev/configure-usb-modem b/udev/configure-usb-modem
old mode 100644
new mode 100755
index 97468fc..9972af7
--- a/udev/configure-usb-modem
+++ b/udev/configure-usb-modem
@@ -1,8 +1,21 @@
 #!/bin/sh
 
+DEVPATH=/sys/$1
+USB_ID=
+
+[ -d ${DEVPATH} ] || exit 1
+
+while [ ! "${USB_ID}" ]; do
+    if [ -f ${DEVPATH}/avoid_reset_quirk ]; then
+        USB_ID=$(basename ${DEVPATH})
+        break
+    fi
+    DEVPATH=$(dirname ${DEVPATH})
+done
+
 # Avoid USB resets
-echo "auto" > /sys/bus/usb/devices/3-1/power/control
-echo "3000" > /sys/bus/usb/devices/3-1/power/autosuspend_delay_ms
-echo "enabled" > /sys/bus/usb/devices/3-1/power/wakeup
-echo "1" > /sys/bus/usb/devices/3-1/avoid_reset_quirk
-echo "0" > /sys/bus/usb/devices/3-1/power/persist
+echo "auto" > /sys/bus/usb/devices/${USB_ID}/power/control
+echo "3000" > /sys/bus/usb/devices/${USB_ID}/power/autosuspend_delay_ms
+echo "enabled" > /sys/bus/usb/devices/${USB_ID}/power/wakeup
+echo "1" > /sys/bus/usb/devices/${USB_ID}/avoid_reset_quirk
+echo "0" > /sys/bus/usb/devices/${USB_ID}/power/persist