diff --git a/target/linux/ramips/image/mt7621.mk b/target/linux/ramips/image/mt7621.mk
index 9d2b2536f4..e089fcfa73 100644
--- a/target/linux/ramips/image/mt7621.mk
+++ b/target/linux/ramips/image/mt7621.mk
@@ -2092,6 +2092,9 @@ define Device/MikroTik
   DEVICE_PACKAGES := kmod-usb3 -uboot-envtools
   KERNEL_NAME := vmlinuz
   KERNEL := kernel-bin | append-dtb-elf
+  LOADER_TYPE := elf
+  KERNEL_INITRAMFS_NAME := vmlinux-initramfs
+  KERNEL_INITRAMFS := $(KERNEL_DTB) | loader-kernel
   IMAGE/sysupgrade.bin := append-kernel | yaffs-filesystem -L | \
 	pad-to $$$$(BLOCKSIZE) | append-rootfs | pad-rootfs | check-size | \
 	append-metadata