diff --git a/target/linux/sunxi/image/Makefile b/target/linux/sunxi/image/Makefile
index f199043639..04cddd8464 100644
--- a/target/linux/sunxi/image/Makefile
+++ b/target/linux/sunxi/image/Makefile
@@ -39,6 +39,7 @@ endef
 
 define Image/Build
 	$(call Image/Build/$(1),$(1))
+	dd if=$(KDIR)/root.$(1) of=$(BIN_DIR)/openwrt-$(BOARD)-root.$(1) bs=128k conv=sync
 endef
 
 $(eval $(call BuildImage))