Doesn't compile variables in media queries' conditions

[remi-blaise]

trafficstars

On running of this code :

@media_1 : 1600px;

@media (min-width: @media_1) {
    header
    {
        background-color: white;
  }
}

The compiler throw :

Fatal Error:
====================
parse error: failed at `@media_1 : 1600px;` line: 1