Question on Razavi book?

"If the power amplifier generates 1W, then an attenuation of 2dB in the filter translates to 370mW loss of power"

I think 10*log(0.37/1)=-4.3dB , not -2dB. Am I right?

1000mw-370mw=630mw
630/1000=0.63
10*log(0.63)=-2db