Stop remove empty selectors

Sass will remove empty selectors by default, Is there an options to disable this?

Such as

.empty {
}

will compile to nothing, but I want it compile to .empty{}, otherwise I got error when using css-modules.

ref: https://github.com/sass/node-sass/issues/1569 https://github.com/css-modules/css-modules/issues/140

[mgreter]

Can be done with important comments

.empty {
    /*! keep */
}

[chriseppstein]

What @mgreter said. Although, a random weird comment isn’t very self documenting so maybe wrap it up in a mixin:

@mixin empty-module($module-name) {
  .#{$module-name} { /*!*/ }
}
@include empty-module("empty");