diff --git a/Makefile b/Makefile
index 9c597a3..39a09f3 100644
--- a/Makefile
+++ b/Makefile
@@ -228,6 +228,9 @@ include $(RULESPATH)/rules.mk
 flash: build/ch.bin
 	dfu-util -d 0483:df11 -a 0 -s 0x08000000:leave -D build/ch.bin
 
+dfu:
+	printf "reset dfu\r" >/dev/cu.usbmodem401
+
 TAGS: Makefile
 	@etags *.[ch] NANOVNA_STM32_F072/*.[ch] $(shell find ChibiOS/os/hal/ports/STM32/STM32F0xx ChibiOS/os -name \*.\[ch\] -print) 
 	@ls -l TAGS