Organisation.sol calling Libraries

import "ProposalsLibrary.sol";

contract Organisation
{
  using ProposalsLibrary for address;
  address public eternalStorage;

  function Organisation(address _eternalStorage) {
    eternalStorage = _eternalStorage;
  }

  function addProposal(bytes32 _name)
  {
    eternalStorage.addProposal(_name);
  }

}