diff --git a/README.md b/README.md
index 4f949dea1e9b932447c2f1c52895fc9a634985f4..780a9749fbff1e61c26d3288cf8ab7fea34e9ff7 100644
--- a/README.md
+++ b/README.md
@@ -113,8 +113,8 @@ This module includes a basic tool to update the main file on the MicroPython dev
 # test_upload.py (Python)
 import mpy_bridge
 
-# instantiate the device on serial port COM34
-d = mpy_bridge.Device("COM34")
+# instantiate device, skip init in case main file is missing
+d = mpy_bridge.Device("COM34", init=False)
 
 # upload main file
 d.upload("embedded/main.py", "main.py")