diff --git a/target/linux/ramips/image/mt7621.mk b/target/linux/ramips/image/mt7621.mk
index 79027c8c32a..1c2aa000c3c 100755
--- a/target/linux/ramips/image/mt7621.mk
+++ b/target/linux/ramips/image/mt7621.mk
@@ -1419,7 +1419,7 @@ ifneq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),)
   IMAGE/factory.bin := append-image-stage initramfs-kernel.bin | \
 	inteno-bootfs | inteno-y3-header EX400 | append-md5sum-ascii-salted
 endif
-  IMAGE/sysupgrade.bin := append-kernel | inteno-bootfs | \
+  IMAGE/sysupgrade.bin := append-kernel | inteno-bootfs | pad-to 10M | \
     sysupgrade-tar kernel=$$$$@ | check-size | append-metadata
   DEVICE_IMG_NAME = $$(DEVICE_IMG_PREFIX)-$$(2)
   DEVICE_PACKAGES := kmod-mt7603 kmod-mt7615-firmware kmod-usb3 kmod-keyboard-sx951x kmod-button-hotplug