diff --git a/src/atsamd/Makefile b/src/atsamd/Makefile
index 7fbfcbcf..2ed3a6b4 100644
--- a/src/atsamd/Makefile
+++ b/src/atsamd/Makefile
@@ -61,6 +61,5 @@ BOSSAC_OFFSET-$(CONFIG_MACH_SAMD21) := 0x2000
 BOSSAC_OFFSET-$(CONFIG_MACH_SAMD51) := 0x4000
 
 flash: $(OUT)klipper.bin lib/bossac/bin/bossac
-	@echo "  Flashing $< to $(FLASH_DEVICE) via bossac"
-	$(Q)if [ -z $(FLASH_DEVICE) ]; then echo "Please specify FLASH_DEVICE"; exit 1; fi
-	$(Q)lib/bossac/bin/bossac -U -p "$(FLASH_DEVICE)" -a --offset=$(BOSSAC_OFFSET-y) -w $< -v -b -R
+	@echo "  Flashing $< to $(FLASH_DEVICE)"
+	$(Q)$(PYTHON) ./scripts/flash_usb.py -t atsamd -d "$(FLASH_DEVICE)" -o $(BOSSAC_OFFSET-y) $(OUT)klipper.bin