diff --git a/target/linux/mediatek/image/filogic.mk b/target/linux/mediatek/image/filogic.mk
index e83a91a4a3..ea5c539f44 100644
--- a/target/linux/mediatek/image/filogic.mk
+++ b/target/linux/mediatek/image/filogic.mk
@@ -572,6 +572,7 @@ define Device/xiaomi_redmi-router-ax6000
   BLOCKSIZE := 128k
   PAGESIZE := 2048
   KERNEL_IN_UBI := 1
+  IMAGE/factory.bin := append-ubi | check-size $$$$(IMAGE_SIZE)
   IMAGE/sysupgrade.bin := sysupgrade-tar | append-metadata
 endef
 TARGET_DEVICES += xiaomi_redmi-router-ax6000