Gillingham striker Dennis Oli (hip) is rated as doubtful having been substituted in the win over Southend.
Top scorer Simeon Jackson (hamstring) is fit again having returned in Monday's win. Simon King is out for the season with ankle ligament damage.
Gillingham manager Mark Stimson told BBC Radio Kent: "Millwall are flying at home and we aren't doing so well away from home but hopefully that could change.
"Only recently we went to Charlton and pulled off a good result so if we perform to our ability there is no reason why we can't get anything on Saturday.
"We know they're a good side but we're going to give it a go and give it our best shot and if we do perform like we can we could surprise them."
Source: BBC Sport
Source: BBC Sport