diff --git a/target/linux/ramips/image/mt7620.mk b/target/linux/ramips/image/mt7620.mk
index 8f5d354e33c..e56e96d347b 100644
--- a/target/linux/ramips/image/mt7620.mk
+++ b/target/linux/ramips/image/mt7620.mk
@@ -62,6 +62,7 @@ TARGET_DEVICES += alfa-network_tube-e4g
 define Device/amit_jboot
   DLINK_IMAGE_OFFSET := 0x10000
   KERNEL := $(KERNEL_DTB)
+  KERNEL_SIZE := 2048k
   IMAGES += factory.bin
   IMAGE/sysupgrade.bin := mkdlinkfw | pad-rootfs | append-metadata
   IMAGE/factory.bin := mkdlinkfw | pad-rootfs | mkdlinkfw-factory