diff --git a/config/initializers/extends.rb b/config/initializers/extends.rb
index c12b79586..2aaa9daf9 100644
--- a/config/initializers/extends.rb
+++ b/config/initializers/extends.rb
@@ -366,6 +366,7 @@ class Extends
 
   NOTIFIABLE_ACTIVITIES = %w(
     assign_user_to_project
+    unassign_user_from_project
     change_user_role_on_project
     edit_module_comment
     delete_module_comment