diff --git a/app/observers/users_project_observer.rb b/app/observers/users_project_observer.rb
index 728607f03ad..34cae93f8cf 100644
--- a/app/observers/users_project_observer.rb
+++ b/app/observers/users_project_observer.rb
@@ -1,5 +1,6 @@
 class UsersProjectObserver < ActiveRecord::Observer
   def after_commit(users_project)
+    return if users_project.destroyed?
     Notify.project_access_granted_email(users_project.id).deliver
   end
 end