Compressing, Vu, Peak level meter

Hello guys to which meter Vu ( the one which is in compressor) or the peak level meter (my Daw level meter) should i refer when applying make up gain after compressing. Its strange for my for example i compress kick drum by 5 db Gain reduction my peak level meter shows that i need to apply 0,8 db of gain while my compressor plugin shows that i need to apply 5 db of gain because thats how much of compression im doing. So to which meter i need refer when applying make up gain after compression. Thx