Falcon linking resources to ByteArray (rather than display objects)

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I'm getting an error:

TypeError: Error #2022: Class PlayerResource$ must inherit from
DisplayObject to link to a symbol.

for the class, which looks like this:

package com.powtoon.assets
{
    import flash.utils.ByteArray;

    [Embed(source="../../../../assets/hx-player.swf",
mimeType="application/octet-stream")]

    public class PlayerResource extends ByteArray { }
}

When this is compiled with Falcon, this must be incorrectly linked to
a (wrong kind of) symbol?

The relevant bit of the Ant build script looks like this:

<mxmlc file="${basedir}/as3/com/powtoon/preloader/PreloaderFrame.as"
           output="${basedir}/bin/player-next.swf"
           static-link-runtime-shared-libraries="true"
           debug="${debug}" use-network="true"
           warn-unlikely-function-value="false"
           optimize="true">
      <frame label="start" classname="com.powtoon.player.PlayerNext"/>
      <includes>com.powtoon.assets.PlayerResource</includes>

Best,

Oleg