diff --git a/app/controllers/documents_controller.rb b/app/controllers/documents_controller.rb
index 633ffd8ed..09b76781f 100644
--- a/app/controllers/documents_controller.rb
+++ b/app/controllers/documents_controller.rb
@@ -76,4 +76,11 @@ class DocumentsController < ApplicationController
     Mailer.deliver_attachments_added(attachments[:files]) if attachments.present? && attachments[:files].present? && Setting.notified_events.include?('document_added')
     redirect_to :action => 'show', :id => @document
   end
+
+private
+  def find_project
+    @project = Project.find(params[:project_id])
+  rescue ActiveRecord::RecordNotFound
+    render_404
+  end
 end