Is there any way to use :css with an element defined by defelem?

I've tried something along the lines of:

(defelem foo [{key1 :key1 key2 :key2 :as attrs} _]
  (let [leftovers (dissoc attrs :key1 key2)]
    (div leftovers ...)))
(foo :css {:width ...})

The css part gets swallowed and isn't available in leftovers

@fiddlerwoaroof try :style instead of :css

also check the HTML output and see if the attribute is there at all