diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index ca0156be4..37c28cfb2 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -2,7 +2,7 @@ module ApplicationHelper
   include Pagy::Frontend
 
   def browser_title(title, pagy, *resources)
-    title = sanitize(title).gsub("&", "&")
+    title = sanitize(title)&.gsub("&", "&")
     if resources.any? { |r| r.present? && r.errors.present? }
       "Error: #{[title, t('service_name'), 'GOV.UK'].select(&:present?).join(' - ')}"
     else