Trying to compile serialgateway but getting an error

I followed the video on setting up a serial gateway on mysensors. However when I try to compile the serial gateway, I get the following error.
In file included from C:\Users\scott\Documents\Arduino\ScottsSensors\SerialGateway\SerialGateway.ino:50:0:
C:\Users\scott\Documents\Arduino\libraries\MySensors/MySensor.h:259:4: error: #error No forward link or gateway feature activated. This means nowhere to send messages! Pretty pointless.

So the question is, do I need to modify the mysensor.h?