A WA police officer left paralysed after contracting a rare disease has been granted a record $6 million compensation payment.

Ryan Marron became ill with the mosquito-borne disease Murray Valley encephalitis five years ago while working in the Kimberley.

The State Government had offered a $5.5 million no-strings-attached payment, but was asked to reconsider.

Attorney General Michael Mischin said he was pleased the new deal was reached amicably.

He spoke with Adam Shand.