Arduino: 1.8.1 (Windows 7), :"Arduino Nano, ATmega328"

C:\Program Files (x86)\Arduino\libraries\RobotIRremote\src\IRremoteTools.cpp:5:16: error: 'TKD2' was not declared in this scope

 int RECV_PIN = TKD2; // the pin the IR receiver is connected to

                ^

exit status 1
    Arduino Nano.

      
   ->  ->
"     "
