wake up arduino through external interrupt wih pin change

hi this is my first project with Arduino. I need to wake up the Arduino MEGA2560 from sleeping (power down mode) by an external interrupt and I need the pin CHANGE instead of the LOW. I tried to set the register with this code:

EICRA &= ~(bit(ISC00) | bit (ISC01));  // clear existing flags
  EICRA |=  bit (ISC00);    // set wanted flags (change level interrupt)
  EIFR   =  bit (INTF0);    // clear flag for interrupt 0
  EIMSK |=  bit (INT0);     // enable it

but what I saw is there is no set for the bit ISC00 and ISC01. Please, if you have any suggestion about, it would be very appreciate...