diff --git a/target/linux/ramips/image/mt7621.mk b/target/linux/ramips/image/mt7621.mk
index 07c68944ed5..2549f353e98 100644
--- a/target/linux/ramips/image/mt7621.mk
+++ b/target/linux/ramips/image/mt7621.mk
@@ -2824,8 +2824,8 @@ define Device/tplink_eap615-wall-v1
   DEVICE_VARIANT := v1
   DEVICE_PACKAGES := kmod-mt7915-firmware -uboot-envtools
   TPLINK_BOARD_ID := EAP615-WALL-V1
-  KERNEL := kernel-bin | lzma | fit lzma $$(KDIR)/image-$$(firstword $$(DEVICE_DTS)).dtb | pad-to 64k
-  KERNEL_INITRAMFS := kernel-bin | lzma | fit lzma $$(KDIR)/image-$$(firstword $$(DEVICE_DTS)).dtb with-initrd
+  KERNEL := kernel-bin | lzma -d22 | fit lzma $$(KDIR)/image-$$(firstword $$(DEVICE_DTS)).dtb | pad-to 64k
+  KERNEL_INITRAMFS := kernel-bin | lzma -d22 | fit lzma $$(KDIR)/image-$$(firstword $$(DEVICE_DTS)).dtb with-initrd
   IMAGE_SIZE := 13248k
 endef
 TARGET_DEVICES += tplink_eap615-wall-v1