diff --git a/QvitterPlugin.php b/QvitterPlugin.php
index 0d22617..a008734 100644
--- a/QvitterPlugin.php
+++ b/QvitterPlugin.php
@@ -606,12 +606,7 @@ class QvitterPlugin extends Plugin {
 				}
 			}
 
-		if($notice->source == 'activity' || $notice->object_type == 'activity' || $notice->object_type == 'http://activitystrea.ms/schema/1.0/activity' || $notice->verb == 'delete') {
-			$twitter_status['is_activity'] = true;
-			}
-		else {
-			$twitter_status['is_activity'] = false;
-			}
+		$twitter_status['is_post_verb'] = ActivityUtils::compareVerbs(ActivityVerb::POST, array($notice->verb));
 
 		if(ActivityUtils::compareTypes($notice->verb, array('qvitter-delete-notice', 'delete'))) {
 			$twitter_status['qvitter_delete_notice'] = true;
diff --git a/js/dom-functions.js b/js/dom-functions.js
index 56c6ebd..7eb911d 100644
--- a/js/dom-functions.js
+++ b/js/dom-functions.js
@@ -1550,7 +1550,7 @@ function addToFeed(feed, after, extraClasses) {
 		if(window.currentStreamObject.name == 'notifications') {
 
 			// don't show any notices with object_type "activity"
-			if(typeof obj.notice != 'undefined' && obj.notice !== null && obj.notice.is_activity === true) {
+			if(typeof obj.notice != 'undefined' && obj.notice !== null && obj.notice.is_post_verb === false) {
 				return true;
 				}
 
@@ -1861,7 +1861,7 @@ function buildQueetHtml(obj, idInStream, extraClasses, requeeted_by, isConversat
 		}
 
 	// activity? (hidden with css)
-	if(obj.source == 'activity' || obj.is_activity === true) {
+	if(obj.source == 'activity' || obj.is_post_verb === false) {
 		extraClasses += ' activity always-hidden';
 
 		// because we had an xss issue with activities, the obj.statusnet_html of qvitter-deleted-activity-notices can contain unwanted html, so we escape, they are hidden anyway
diff --git a/js/misc-functions.js b/js/misc-functions.js
index 7e81617..9f4c932 100644
--- a/js/misc-functions.js
+++ b/js/misc-functions.js
@@ -832,7 +832,7 @@ function searchForUpdatedNoticeData(obj) {
 					// sometimes activity notices don't get the is_activity flag set to true
 					// maybe because they were in the process of being saved when
 					// we first got them
-					if(obj.is_activity) {
+					if(obj.is_post_verb === false) {
 						streamItemFoundInFeed.addClass('activity always-hidden');
 						}