Error message involving micros()

I wanted to use micros(), but the arduino application gives me the message: " In function 'void loop()': error: 'micros' was not declared in this scope"

I tried just taking the example code from reference section of the arduino website, but it simply doesn't work. When I type "micros", the text doesn't turn brown like when I type "millis".

Do you use Arduino IDE 0015 ?

I just downloaded it and it's working fine. It was supposed to check for updates on start up. Still, I probably should have checked the website first. Thank you for the help!