Palace assistant boss Keith Millen says he does not expect the striker to leave, despite interest from Bournemouth.
Millen told the South London Press: "The manager has spoken to him and told Glenn that he is in his plans. He is a different striker to what we've got, especially with Yaya Sanogo out. He's a big option for us.
"Glenn wants to play and the manager has probably not seen as much of him as we have.
"It just depends how he wants to play - if it is with a centre-forward or targetman. You need to differ it for certain teams.
"Glenn gets frustrated because he wants to play football but he just has to be patient. I'm sure he'll play a part before the end of the season."
For the big stories and the banter follow us on Twitter: @tribalfootball