diff --git a/koha-tmpl/intranet-tmpl/prog/en/modules/serials/subscription-numberpatterns.tt b/koha-tmpl/intranet-tmpl/prog/en/modules/serials/subscription-numberpatterns.tt
index 66439a8fc1..c4abd5b8f9 100644
--- a/koha-tmpl/intranet-tmpl/prog/en/modules/serials/subscription-numberpatterns.tt
+++ b/koha-tmpl/intranet-tmpl/prog/en/modules/serials/subscription-numberpatterns.tt
@@ -84,7 +84,8 @@
                 </li>
                 <li>
                   <label for="displayorder">Display order:</label>
-                  <input type="text" id="displayorder" name="displayorder" value="[% displayorder | html %]" />
+                  <input type="text" inputmode="numeric" pattern="\d*" id="displayorder" name="displayorder" value="[% displayorder | html %]" />
+                  <div class="hint">Only numeric characters are allowed</div>
                 </li>
               </ol>
               <table>