diff --git a/target/linux/ar71xx/image/tiny.mk b/target/linux/ar71xx/image/tiny.mk
index 86ed2c7f2b..3b4a2ae540 100644
--- a/target/linux/ar71xx/image/tiny.mk
+++ b/target/linux/ar71xx/image/tiny.mk
@@ -1,3 +1,11 @@
+define Build/mkbuffaloimg
+	$(STAGING_DIR_HOST)/bin/mkbuffaloimg -B $(BOARDNAME) \
+		-R $$(($(subst k, * 1024,$(ROOTFS_SIZE)))) \
+		-K $$(($(subst k, * 1024,$(KERNEL_SIZE)))) \
+		-i $@ -o $@.new
+	mv $@.new $@
+endef
+
 define Device/bhr-4grv2
   DEVICE_TITLE := Buffalo BHR-4GRV2
   BOARDNAME := BHR-4GRV2
@@ -21,4 +29,4 @@ define Device/zbt-we1526
   MTDPARTS := spi0.0:256k(u-boot)ro,64k(u-boot-env)ro,14528k(rootfs),1472k(kernel),64k(art)ro,16000k@0x50000(firmware)
   IMAGE/sysupgrade.bin := append-rootfs | pad-rootfs | pad-to $$$$(ROOTFS_SIZE) | append-kernel | check-size $$$$(IMAGE_SIZE)
 endef
-TARGET_DEVICES += zbt-we1526
\ No newline at end of file
+TARGET_DEVICES += zbt-we1526