The Prison Officers Union has signalled a likely increase in industrial action in the wake of nurses being offered a 14 per cent pay rise from the State Government.
The Premier Colin Barnett made the offer yesterday to avert a planned 24 hour strike by public hospital nurses.
He had previously said the government was not able to make the offer while it was in caretaker mode.
The Prison Officers Union's John Welch says his members have taken note of how nurses conducted their negotiations, and are likely to consider similar methods.
He says the union is frustrated at the state of wage negotiations with the Government, and says the current offer of nine per cent is inadequate.
"We are holding a meeting on Wednesday of our delegates where we intend to put forward a stronger strategy of industrial action where the government will clearly hear our voice," he said.
"And, they will be left in no confusion as to what it is our members think is a fair outcome."
The Community and Public Sector Union also says it will consider a more aggressive wage negotiation stance after the pay offer to nurses.
The CPSU's Toni Walkington says the Premier's intervention is a sign the government has changed its wages policy.
She says the union will consider its position ahead of the next bargaining period.
"I can't pre-empt what our council might decide but certainly I wouldn't rule out our members being concerned about their future to engage in some sort of industrial action," she said.
Earlier, Mr Barnett said he hoped the nurses' deal would not set a precedent for other unions.