diff --git a/framework/core/js/src/common/models/Discussion.js b/framework/core/js/src/common/models/Discussion.js
index 21227ba68..54ce6f1ed 100644
--- a/framework/core/js/src/common/models/Discussion.js
+++ b/framework/core/js/src/common/models/Discussion.js
@@ -13,7 +13,7 @@ Object.assign(Discussion.prototype, {
   user: Model.hasOne('user'),
   firstPost: Model.hasOne('firstPost'),
 
-  lastTime: Model.attribute('lastTime', Model.transformDate),
+  lastPostedAt: Model.attribute('lastPostedAt', Model.transformDate),
   lastPostedUser: Model.hasOne('lastPostedUser'),
   lastPost: Model.hasOne('lastPost'),
   lastPostNumber: Model.attribute('lastPostNumber'),
@@ -67,7 +67,7 @@ Object.assign(Discussion.prototype, {
   unreadCount() {
     const user = app.session.user;
 
-    if (user && user.readTime() < this.lastTime()) {
+    if (user && user.readTime() < this.lastPostedAt()) {
       return Math.max(0, this.lastPostNumber() - (this.readNumber() || 0));
     }
 
diff --git a/framework/core/js/src/forum/components/TerminalPost.js b/framework/core/js/src/forum/components/TerminalPost.js
index 2fdb40bf4..c4c1b5bf7 100644
--- a/framework/core/js/src/forum/components/TerminalPost.js
+++ b/framework/core/js/src/forum/components/TerminalPost.js
@@ -16,7 +16,7 @@ export default class TerminalPost extends Component {
     const lastPost = this.props.lastPost && discussion.repliesCount();
 
     const user = discussion[lastPost ? 'lastPostedUser' : 'user']();
-    const time = discussion[lastPost ? 'lastTime' : 'createdAt']();
+    const time = discussion[lastPost ? 'lastPostedAt' : 'createdAt']();
 
     return (
       <span>
diff --git a/framework/core/src/Api/Serializer/DiscussionSerializer.php b/framework/core/src/Api/Serializer/DiscussionSerializer.php
index f971f4374..3a2395eee 100644
--- a/framework/core/src/Api/Serializer/DiscussionSerializer.php
+++ b/framework/core/src/Api/Serializer/DiscussionSerializer.php
@@ -40,7 +40,7 @@ class DiscussionSerializer extends BasicDiscussionSerializer
             'commentCount'      => (int) $discussion->comment_count,
             'participantCount'  => (int) $discussion->participant_count,
             'createdAt'         => $this->formatDate($discussion->created_at),
-            'lastTime'          => $this->formatDate($discussion->last_posted_at),
+            'lastPostedAt'      => $this->formatDate($discussion->last_posted_at),
             'lastPostNumber'    => (int) $discussion->last_post_number,
             'canReply'          => $gate->allows('reply', $discussion),
             'canRename'         => $gate->allows('rename', $discussion),