Back to Arduino Support

Warning: Invalid DFU suffix signature

When uploading a sketch to Portenta H7 you may receive this warning in the console:

Warning: Invalid DFU suffix signature
A valid DFU suffix will be required in a future dfu-util release

This warning is expected, and is only displayed if verbose output is enabled.

If upload complete. is output to console the upload was successful.

  • Last edited:
Was this article helpful?
Do you want to contribute? Visit the Github repository
Return to top

Didn’t find what you were looking for?

Arduino Docs

Tutorials, data sheets, guides and other technical documentation.

Arduino Forum

Connect with the community, get help with your project, and discuss everything Arduino.

Arduino Discord

There are a lot of Arduino enthusiasts who are more than willing to help out. Head over Discord to start a discussion.

Contact Arduino

Need help with a product, need to make an exchange, or can't find a question answered? Email us and we'll answer as soon as possible.