1 files changed, 3 insertions, 1 deletions
diff --git a/addons/mail/static/src/components/thread_preview/thread_preview.js b/addons/mail/static/src/components/thread_preview/thread_preview.js
index 6e30005225c..0e5a226a5f2 100644
--- a/addons/mail/static/src/components/thread_preview/thread_preview.js
+++ b/addons/mail/static/src/components/thread_preview/thread_preview.js
@@ -108,7 +108,9 @@ class ThreadPreview extends Component {
      * @param {MouseEvent} ev
      */
     _onClickMarkAsRead(ev) {
-        this.thread.markAsSeen();
+        if (this.thread.lastMessage) {
+            this.thread.markAsSeen(this.thread.lastMessage.id);
+        }
     }
 
 }