FarFieldReferencePos is not declared

Hi,

I am facing a problem when compiling shaders in UE. FarFieldReferencePos is not declared in this shader https://client.redhill.arm.com/gitlab/client-engineering/unrealengine/-/blob/ue5-main/Engine/Shaders/Private/RayTracing/RayTracingLightingCommon.ush?ref_type=heads#L420

How to solve this problem?
thanks,
Idriss