diff --git a/Marlin/src/HAL/DUE/upload_extra_script.py b/Marlin/src/HAL/DUE/upload_extra_script.py
index 06c2b914f53d..d52a0a3642b4 100644
--- a/Marlin/src/HAL/DUE/upload_extra_script.py
+++ b/Marlin/src/HAL/DUE/upload_extra_script.py
@@ -14,5 +14,5 @@
 
 	# Use bossac.exe on Windows
 	env.Replace(
-	    UPLOADCMD="bossac --info --unlock --write --verify --reset --erase -U false --boot"
+	    UPLOADCMD="bossac --info --unlock --write --verify --reset --erase -U false --boot $SOURCE"
 	)