diff --git a/koha-tmpl/opac-tmpl/bootstrap/en/modules/opac-opensearch.tt b/koha-tmpl/opac-tmpl/bootstrap/en/modules/opac-opensearch.tt
index d585701d22..7b9cd8b97e 100644
--- a/koha-tmpl/opac-tmpl/bootstrap/en/modules/opac-opensearch.tt
+++ b/koha-tmpl/opac-tmpl/bootstrap/en/modules/opac-opensearch.tt
@@ -25,7 +25,7 @@
      <opensearch:totalResults>[% total %]</opensearch:totalResults>
      <opensearch:startIndex>[% offset %]</opensearch:startIndex>
      [% IF ( results_per_page ) %]
-       <opensearch:itemsPerPage>[% results_per_page %]</opensearch:itemsPerPage>
+       <opensearch:itemsPerPage>[% results_per_page |html%]</opensearch:itemsPerPage>
      [% ELSE %]
        <opensearch:itemsPerPage>20</opensearch:itemsPerPage>
      [% END %]