Walker has made six appearances for the U's during his loan spell
Colchester United manager Paul Lambert has said he wants to sign goalkeeper Jimmy Walker on a permanent basis.
The 35-year-old West Ham shot-stopper has one game left of his spell with the U's, during which he has helped the side rise to 11th in League One.
Boss Lambert told BBC Essex: "He is a brilliant goalkeeper and he has been a massive help to us since he's been at the club.
"His last game is on Saturday and we'll do our best to keep him."
Walker's latest contribution to the U's resurgence came against Leyton Orient on Sunday, when he saved Adam Boyd's second-half penalty in their 1-0 win at the Community Stadium.
"He is a top, top goalkeeper," Lambert said.
"I've told him he reminds me of Andy Goram, who was an unbelievable keeper up in Scotland and Jimmy is the same."
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