diff --git a/target/linux/ar71xx/image/mikrotik.mk b/target/linux/ar71xx/image/mikrotik.mk
index a0a7b7a2dd..3238a885a8 100644
--- a/target/linux/ar71xx/image/mikrotik.mk
+++ b/target/linux/ar71xx/image/mikrotik.mk
@@ -2,44 +2,50 @@ define Device/mikrotik
   PROFILES := Default
   DEVICE_PACKAGES := kmod-usb-core kmod-usb-ohci kmod-usb2 kmod-usb-ledtrig-usbport
   BOARD_NAME := routerboard
-  KERNEL_INITRAMFS :=
-  KERNEL_NAME := loader-generic.elf
-  KERNEL := kernel-bin | kernel2minor -s 2048 -e -c
-  FILESYSTEMS := squashfs
-  IMAGES := sysupgrade.bin
-  IMAGE/sysupgrade.bin := sysupgrade-tar
+  LOADER_TYPE := elf
+  KERNEL_NAME := vmlinux.bin.lzma
+  KERNEL := kernel-bin | loader-kernel
+  KERNEL_INITRAMFS_NAME := vmlinux-initramfs.bin.lzma
+  MIKROTIK_CHUNKSIZE :=
+  IMAGE/sysupgrade.bin/squashfs :=
+endef
+DEVICE_VARS += MIKROTIK_CHUNKSIZE
+
+define Device/mikrotik-nand
+  $(Device/mikrotik)
+  IMAGE/sysupgrade.bin/squashfs = append-kernel | \
+	kernel2minor -s $$(MIKROTIK_CHUNKSIZE) -e -c | sysupgrade-tar kernel=$$$$@
 endef
 
 define Device/nand-64m
-  $(Device/mikrotik)
+  $(Device/mikrotik-nand)
+  MIKROTIK_CHUNKSIZE := 512
   DEVICE_TITLE := MikroTik RouterBoard (64 MB NAND)
-  KERNEL := kernel-bin | kernel2minor -s 512 -e -c
 endef
 TARGET_DEVICES += nand-64m
 
 define Device/nand-large
-  $(Device/mikrotik)
+  $(Device/mikrotik-nand)
+  MIKROTIK_CHUNKSIZE := 2048
   DEVICE_TITLE := MikroTik RouterBoard (>= 128 MB NAND)
-  KERNEL := kernel-bin | kernel2minor -s 2048 -e -c
 endef
 TARGET_DEVICES += nand-large
 
 define Device/nand-large-ac
-  $(Device/mikrotik)
+  $(Device/mikrotik-nand)
+  MIKROTIK_CHUNKSIZE := 2048
   DEVICE_TITLE := MikroTik RouterBoard (>= 128 MB NAND, 802.11ac)
   DEVICE_PACKAGES += kmod-ath10k ath10k-firmware-qca988x
-  KERNEL := kernel-bin | kernel2minor -s 2048 -e -c
   SUPPORTED_DEVICES := rb-921gs-5hpacd-r2
 endef
 TARGET_DEVICES += nand-large-ac
 
 define Device/rb-nor-flash-16M
+  $(Device/mikrotik)
   DEVICE_TITLE := MikroTik RouterBoard (16 MB SPI NOR)
   DEVICE_PACKAGES := rbcfg rssileds -nand-utils kmod-ledtrig-gpio
   IMAGE_SIZE := 16000k
-  LOADER_TYPE := elf
   KERNEL_INSTALL := 1
-  KERNEL := kernel-bin | lzma | loader-kernel
   SUPPORTED_DEVICES := rb-750-r2 rb-750up-r2 rb-750p-pbr2 rb-911-2hn rb-911-5hn rb-941-2nd rb-951ui-2nd rb-952ui-5ac2nd rb-962uigs-5hact2hnt rb-lhg-5nd rb-map-2nd rb-mapl-2nd rb-wap-2nd rb-wapr-2nd
   IMAGE/sysupgrade.bin := append-kernel | kernel2minor -s 1024 -e | pad-to $$$$(BLOCKSIZE) | \
 	append-rootfs | pad-rootfs | append-metadata | check-size $$$$(IMAGE_SIZE)