The Irons have been in talks with the player for several days and remain hopeful they can seal a deal early this week.
The France midfielder, on loan at West Brom last season, is available for £2million.
The 29-year-old has attracted interest from Hull, Crystal Palace and QPR but the Hammers are currently in the driving seat and trying to agree personal terms with the player.
A source told ClaretandHugh exclusively: “It’s not done but we are still talking so we remain hopeful.
“There’s no point in quoting odds for or against – things can take you by surprise but it’s certainly still alive.”