diff --git a/framework/core/js/src/common/helpers/userOnline.js b/framework/core/js/src/common/helpers/userOnline.js
index 8a7052c89..fcbef1673 100644
--- a/framework/core/js/src/common/helpers/userOnline.js
+++ b/framework/core/js/src/common/helpers/userOnline.js
@@ -7,7 +7,7 @@ import icon from './icon';
  * @return {Object}
  */
 export default function userOnline(user) {
-    if (user.lastSeenTime() && user.isOnline()) {
+    if (user.lastSeenAt() && user.isOnline()) {
         return <span className="UserOnline">{icon('fas fa-circle')}</span>;
     }
 }
diff --git a/framework/core/js/src/common/models/User.js b/framework/core/js/src/common/models/User.js
index f49512ffc..284f75413 100644
--- a/framework/core/js/src/common/models/User.js
+++ b/framework/core/js/src/common/models/User.js
@@ -20,7 +20,7 @@ Object.assign(User.prototype, {
   groups: Model.hasMany('groups'),
 
   joinTime: Model.attribute('joinTime', Model.transformDate),
-  lastSeenTime: Model.attribute('lastSeenTime', Model.transformDate),
+  lastSeenAt: Model.attribute('lastSeenAt', Model.transformDate),
   readTime: Model.attribute('readTime', Model.transformDate),
   unreadNotificationsCount: Model.attribute('unreadNotificationsCount'),
   newNotificationsCount: Model.attribute('newNotificationsCount'),
@@ -54,7 +54,7 @@ Object.assign(User.prototype, {
    * @public
    */
   isOnline() {
-    return this.lastSeenTime() > moment().subtract(5, 'minutes').toDate();
+    return this.lastSeenAt() > moment().subtract(5, 'minutes').toDate();
   },
 
   /**
diff --git a/framework/core/js/src/forum/components/SettingsPage.js b/framework/core/js/src/forum/components/SettingsPage.js
index 9ea3993a7..e58e1204c 100644
--- a/framework/core/js/src/forum/components/SettingsPage.js
+++ b/framework/core/js/src/forum/components/SettingsPage.js
@@ -134,7 +134,7 @@ export default class SettingsPage extends UserPage {
         children: app.translator.trans('core.forum.settings.privacy_disclose_online_label'),
         state: this.user.preferences().discloseOnline,
         onchange: (value, component) => {
-          this.user.pushAttributes({lastSeenTime: null});
+          this.user.pushAttributes({lastSeenAt: null});
           this.preferenceSaver('discloseOnline')(value, component);
         }
       })
diff --git a/framework/core/js/src/forum/components/UserCard.js b/framework/core/js/src/forum/components/UserCard.js
index 68c743a00..fa042005c 100644
--- a/framework/core/js/src/forum/components/UserCard.js
+++ b/framework/core/js/src/forum/components/UserCard.js
@@ -79,16 +79,16 @@ export default class UserCard extends Component {
   infoItems() {
     const items = new ItemList();
     const user = this.props.user;
-    const lastSeenTime = user.lastSeenTime();
+    const lastSeenAt = user.lastSeenAt();
 
-    if (lastSeenTime) {
+    if (lastSeenAt) {
       const online = user.isOnline();
 
       items.add('lastSeen', (
         <span className={'UserCard-lastSeen' + (online ? ' online' : '')}>
           {online
             ? [icon('fas fa-circle'), ' ', app.translator.trans('core.forum.user.online_text')]
-            : [icon('far fa-clock'), ' ', humanTime(lastSeenTime)]}
+            : [icon('far fa-clock'), ' ', humanTime(lastSeenAt)]}
         </span>
       ));
     }
diff --git a/framework/core/src/Api/Serializer/UserSerializer.php b/framework/core/src/Api/Serializer/UserSerializer.php
index 94103106e..9ac6fcb70 100644
--- a/framework/core/src/Api/Serializer/UserSerializer.php
+++ b/framework/core/src/Api/Serializer/UserSerializer.php
@@ -50,7 +50,7 @@ class UserSerializer extends BasicUserSerializer
 
         if ($user->getPreference('discloseOnline')) {
             $attributes += [
-                'lastSeenTime' => $this->formatDate($user->last_seen_at)
+                'lastSeenAt' => $this->formatDate($user->last_seen_at)
             ];
         }