2 files changed, 3 insertions, 2 deletions
diff --git a/addons/mail/static/src/js/services/mail_manager.js b/addons/mail/static/src/js/services/mail_manager.js
index 4a20d24af8d..3ed4031abeb 100644
--- a/addons/mail/static/src/js/services/mail_manager.js
+++ b/addons/mail/static/src/js/services/mail_manager.js
@@ -85,7 +85,7 @@ var MailManager =  AbstractService.extend({
     addMessage: function (data, options) {
         options = options || {};
         var message = this.getMessage(data.id);
-        var prom = Promise.resolve();
+        var prom;
         if (!message) {
             prom = this._addNewMessage(data, options);
         } else {
@@ -95,6 +95,7 @@ var MailManager =  AbstractService.extend({
                 });
             }
             this._addMessageToThreads(message, options);
+            prom = Promise.resolve(message);
         }
         return prom;
     },
diff --git a/addons/mail/static/src/js/services/mail_window_manager.js b/addons/mail/static/src/js/services/mail_window_manager.js
index 5cc965b5c7a..a832b0b0793 100644
--- a/addons/mail/static/src/js/services/mail_window_manager.js
+++ b/addons/mail/static/src/js/services/mail_window_manager.js
@@ -106,7 +106,7 @@ MailManager.include({
             // This may happen due to concurrent calls to this method from
             // messaging menu preview click and handling of longpolling chat
             // window state.
-            return;
+            return Promise.resolve();
         }
         var threadWindow = this._getThreadWindow(threadID);
         var prom = Promise.resolve();