@media in mixins

[egor-sorokin]

Hi, I would like to make own mixin wtih mediaqueries like this.

.breakpoint(@maxWidth) {
  @media screen and (max-width: @maxWidth) {
    @content;
  }
}

But it doesn't work. Support it lessphp or not? If not, how can I fix it?
P.S. I don't want to make a lot of copies of this rule (@media screen and (max-width: @MaxWidth)) in my all .less files.
Thanks!