Render grassland in vector maps

It seams to me natural=grassland is not rendered in vector maps. It should be rendered the same way or similarly as landuse=medow. Eg. Zabaged render it a bit yellowish than grass if you want to differentiate.

The grassland is not a cultivated meadow with typically with a long grass and flowers nor a mowed and managed grass field, but just a place where a wild grass dominates without being managed.

I've tried to modify the next style and its parent but nothing is shown so it looks like the tag is not supported:

<rule e="way" k="landuse|natural" v="meadow|grass|grassland" style="hiking|cycle">