diff --git a/main/postmarketos-mkinitfs-hook-netboot/APKBUILD b/main/postmarketos-mkinitfs-hook-netboot/APKBUILD
index bd74a5525..bd9adc138 100644
--- a/main/postmarketos-mkinitfs-hook-netboot/APKBUILD
+++ b/main/postmarketos-mkinitfs-hook-netboot/APKBUILD
@@ -1,6 +1,6 @@
 # Maintainer: Mark <clashclanacc2602@gmail.com>
 pkgname=postmarketos-mkinitfs-hook-netboot
-pkgver=1
+pkgver=2
 pkgrel=0
 pkgdesc="Netboot postmarketOS using nbd feature"
 url="https://postmarketos.org"
@@ -21,6 +21,6 @@ package() {
 }
 
 sha512sums="
-9f302b5fb13966d1e6bd9445fe0cf12a2e4fc7e0db50837f3b772628d46df6bec70da00dec3c4ce6b33075e1f906c02f5b796ac521c609b082d2fe9a523fb6cb  netboot.sh
+5c70572944bce9abd4196b4fc8c2df9f90ec7e15d2ff8fce691120ee10f120521fa57f1d2c0edd1d489e113a2b16862d9e02b716e83e6d3251d7525a5152f349  netboot.sh
 3c9c812a6cd25640e6cf4d722cff6c6356d5666ec6009b4c65f89e62211cc406d2cd09e0fdda6b1c1906ee32c3854988ab701cee8811208e3ef666f09e638568  netboot.modules
 "
diff --git a/main/postmarketos-mkinitfs-hook-netboot/netboot.sh b/main/postmarketos-mkinitfs-hook-netboot/netboot.sh
index 87fdf6174..a8545ab07 100644
--- a/main/postmarketos-mkinitfs-hook-netboot/netboot.sh
+++ b/main/postmarketos-mkinitfs-hook-netboot/netboot.sh
@@ -4,6 +4,7 @@
 . ./init_functions.sh
 NBD_PORT=9999
 NBD_IP=172.16.42.2
+NBD_BLOCK_SIZE=${deviceinfo_rootfs_image_sector_size:-512}
 
 setup_usb_network
 start_unudhcpd
@@ -20,7 +21,7 @@ if [ ! -b /dev/nbd0 ]; then
 	pmos_loop_forever
 fi
 
-while ! busybox nbd-client $NBD_IP $NBD_PORT /dev/nbd0 -b 512; do
+while ! busybox nbd-client $NBD_IP $NBD_PORT /dev/nbd0 -b "$NBD_BLOCK_SIZE"; do
 	echo "Connection attempt not successful, continuing..."
 	sleep 1
 done