Does Lightning require millisatoshi unit?

It seems in a document that I was referenced with this very question that the unit for creating invoices on Lightning is millisatoshi. Do we really need to invoice for 1000 millisatoshi for a 1 sat transaction?

https://github.com/ElementsProject/lightning/blob/master/README.md#sending-and-receiving-payments

[https://avatars2.githubusercontent.com/u/12729539?s=400&v=4]<https://github.com/ElementsProject/lightning/blob/master/README.md#sending-and-receiving-payments>

lightning/README.md at master · ElementsProject/lightning ...<https://github.com/ElementsProject/lightning/blob/master/README.md#sending-and-receiving-payments> github.com c-lightning is a standard compliant implementation of the Lightning Network protocol. The Lightning Network is a scalability solution for Bitcoin, enabling secure and ...