1 files changed, 3 insertions, 0 deletions
diff --git a/addons/mail/static/src/js/thread_windows/thread_window.js b/addons/mail/static/src/js/thread_windows/thread_window.js
index 11a7f8a7926..e5496e0bc3c 100644
--- a/addons/mail/static/src/js/thread_windows/thread_window.js
+++ b/addons/mail/static/src/js/thread_windows/thread_window.js
@@ -402,6 +402,9 @@ var ThreadWindow = AbstractThreadWindow.extend({
      * @param {integer} channelID
      */
     _onUpdateChannel: function (channelID) {
+        if (!this.hasThread()) {
+            return;
+        }
         if (this._thread.getID() !== channelID) {
             return;
         }