--- a/browser/modules/Social.jsm
+++ b/browser/modules/Social.jsm
@@ -208,17 +208,17 @@ this.Social = {
       let place = {
         uri: aURI,
         visits: [{
           visitDate: Date.now() + 1000,
           transitionType: Ci.nsINavHistoryService.TRANSITION_LINK
         }]
       };
       PlacesUtils.asyncHistory.updatePlaces(place, {
-        handleError: function () Cu.reportError("couldn't update history for socialmark annotation"),
+        handleError: () => Cu.reportError("couldn't update history for socialmark annotation"),
         handleResult: function () {},
         handleCompletion: function () {
           promiseSetAnnotation(aURI, providerList).then(function() {
             if (aCallback)
               schedule(function() { aCallback(true); } );
           }).then(null, Cu.reportError);
         }
       });