diff --git a/packages/linux-firmware/brcmfmac_sdio-firmware-rpi/scripts/rpi-btuart b/packages/linux-firmware/brcmfmac_sdio-firmware-rpi/scripts/rpi-btuart
index c27c58c152..fb89ef84e6 100755
--- a/packages/linux-firmware/brcmfmac_sdio-firmware-rpi/scripts/rpi-btuart
+++ b/packages/linux-firmware/brcmfmac_sdio-firmware-rpi/scripts/rpi-btuart
@@ -1,11 +1,18 @@
-#!/bin/bash
+#!/bin/sh
+
+HCIATTACH=/usr/bin/hciattach
+SERIAL=$(awk '/^Serial/{ print $3 }' /proc/cpuinfo)
+B1=${SERIAL:10:2}
+B2=${SERIAL:12:2}
+B3=${SERIAL:14:2}
+BDADDR=$(printf b8:27:eb:%02x:%02x:%02x $((0x$B1 ^ 0xaa)) $((0x$B2 ^ 0xaa)) $((0x$B3 ^ 0xaa)))
 
 if [ "$(cat /proc/device-tree/aliases/uart0)" = "$(cat /proc/device-tree/aliases/serial1)" ] ; then
   if [ "$(wc -c /proc/device-tree/soc/gpio@7e200000/uart0_pins/brcm\,pins | cut -f 1 -d ' ')" = "16" ] ; then
-    /usr/bin/hciattach /dev/serial1 bcm43xx 3000000 flow -
+    $HCIATTACH /dev/serial1 bcm43xx 3000000 flow - $BDADDR
   else
-    /usr/bin/hciattach /dev/serial1 bcm43xx 921600 noflow -
+    $HCIATTACH /dev/serial1 bcm43xx 921600 noflow - $BDADDR
   fi
 else
-  /usr/bin/hciattach /dev/serial1 bcm43xx 460800 noflow -
+  $HCIATTACH /dev/serial1 bcm43xx 460800 noflow - $BDADDR
 fi