| Index: lib/filterUpdateRegistration.js | 
| =================================================================== | 
| --- a/lib/filterUpdateRegistration.js | 
| +++ b/lib/filterUpdateRegistration.js | 
| @@ -10,14 +10,16 @@ | 
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | 
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the | 
| * GNU General Public License for more details. | 
| * | 
| * You should have received a copy of the GNU General Public License | 
| * along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>. | 
| */ | 
|  | 
| +"use strict"; | 
| + | 
| let {FilterNotifier} = require("filterNotifier"); | 
|  | 
| -FilterNotifier.addListener(function(action, item) | 
| +FilterNotifier.addListener((action, item) => | 
| { | 
| _triggerEvent("filterChange", action, item); | 
| }); | 
|  |