diff --git a/utils/hwstub/stub/rk27xx/Makefile b/utils/hwstub/stub/rk27xx/Makefile
index 937655327c..36fd07f3de 100644
--- a/utils/hwstub/stub/rk27xx/Makefile
+++ b/utils/hwstub/stub/rk27xx/Makefile
@@ -12,3 +12,6 @@ BUILD_DIR=$(CURDIR)/build/
 ROOT_DIR=$(CURDIR)/..
 
 include ../hwstub.make
+
+rkw: $(EXEC_BIN)
+	$(SILENT)$(ROOT_DIR)/../../../tools/scramble -rkw -modelnum=73 $(BUILD_DIR)/hwstub.bin $(BUILD_DIR)/hwstub.rkw