I'm using Arduino IDE 1.8.3 on osx.

The static values aren't working
I get an error

DHT11:26: error: 'SimpleDHT' has not been declared
   int err = SimpleDHT::ErrSuccess; 
             ^
DHT11:27: error: 'SimpleDHT' has not been declared

I'm assuming this is more an issue of my compiler than the code? If so any idea how to fix or what I'd search the net for? (I know I can hack it by substituting 0 for SimpleDHT::ErrSuccess, just wondering how to fix that the static class member's not being seen.)