diff --git a/models/activities.js b/models/activities.js
index 2ff8efa5a..9363c6d06 100644
--- a/models/activities.js
+++ b/models/activities.js
@@ -153,11 +153,13 @@ if (Meteor.isServer) {
     }
     if (activity.listId) {
       const list = activity.list();
-      if (list.watchers !== undefined) {
-        watchers = _.union(watchers, list.watchers || []);
+      if (list) {
+        if (list.watchers !== undefined) {
+          watchers = _.union(watchers, list.watchers || []);
+        }
+        params.list = list.title;
+        params.listId = activity.listId;
       }
-      params.list = list.title;
-      params.listId = activity.listId;
     }
     if (activity.oldListId) {
       const oldList = activity.oldList();