diff --git a/target/linux/sunxi/base-files/etc/board.d/02_network b/target/linux/sunxi/base-files/etc/board.d/02_network
index 81c4d6a486..7020b5f29a 100755
--- a/target/linux/sunxi/base-files/etc/board.d/02_network
+++ b/target/linux/sunxi/base-files/etc/board.d/02_network
@@ -33,7 +33,7 @@ sunxi_setup_interfaces()
 
 nanopi_generate_mac()
 {
-	local sd_hash=$(sha256sum /sys/devices/platform/soc/1c0f000.mmc/mmc_host/mmc0/mmc0:*/cid)
+	local sd_hash=$(sha256sum /sys/class/block/mmcblk0/device/cid)
 	local mac_base=$(macaddr_canonicalize "$(echo "${sd_hash}" | dd bs=1 count=12 2>/dev/null)")
 	echo "$(macaddr_unsetbit_mc "$(macaddr_setbit_la "${mac_base}")")"
 }