Turboprop sound bug

I was doing some mission building involving some turboprop aircraft and noticed that the external sound was that of a pure jet engine. Double checked it with an E3 and a C130 and they sound like standard jet engines. I believe the cause is one of the recent patches looks like it has gone through and set the engine type for all turbo props to be "TurboJet" and in fact the only engine types in use in SFMdata.lua are "TurboJet" and "Piston" (the P51).