css function is compiled incorrectly

[appreciated]

Hi,

  .any-class {
    background: radial-gradient(circle, white, black);
  }

Will be compiled to.

  .any-class {
    background: radial, circle, white, black;
  }

Which then is invalid.
Is there any workaround to force the compiler to keep it and not trying to dissolve the function? I'm not experienced with sass, so sorry if there is an obvious solution.

[appreciated]

I see this is actually not the compilers fault but this function's. I can't see the reason why the function has the exact same name as the css function but well...

For others with the same issue I used this approach as a workaround at first:

.any-class {   
    background-image: unquote("radial-gradient(circle, white, black)");   
}

But the wanted "way" is actually to do this:

.any-class {   
    @include radial-gradient(circle, white, black);  
}