journeys entry point: "from" not required in doc but seems mandatory in API

[yohanboniface]

If I try this call: https://api.sncf.com/v1/coverage/sncf/journeys?to=stop_area:OCE:SA:87686006&datetime=20150622T1000, I get this result:

{"message":"from argument is required"}

But the doc says it's not required.
Is the doc out of date or me missing something? :)

Thanks for your lights!