diff --git a/koha-tmpl/intranet-tmpl/prog/en/modules/tools/cleanborrowers.tt b/koha-tmpl/intranet-tmpl/prog/en/modules/tools/cleanborrowers.tt
index bd505fbb29..7de765206a 100644
--- a/koha-tmpl/intranet-tmpl/prog/en/modules/tools/cleanborrowers.tt
+++ b/koha-tmpl/intranet-tmpl/prog/en/modules/tools/cleanborrowers.tt
@@ -1,3 +1,4 @@
+[% USE Koha %]
 [% USE KohaDates %]
 [% INCLUDE 'doc-head-open.inc' %]
 <title>Koha &rsaquo; Tools &rsaquo; Batch patron deletion/anonymization [% IF step == 2 %]&rsaquo; Confirm[% END %][% IF step == 3 %]&rsaquo; Finished[% END %]</title>
@@ -91,6 +92,9 @@
         </fieldset>
         <fieldset>
         <legend>Anonymize checkout history</legend>
+        [% UNLESS Koha.Preference('AnonymousPatron') %]
+            <div class="dialog message">The AnonymousPatron system preference is not defined. You can use this feature anyway but NULL will be used to update the checkout history.</div>
+        [% END %]
         <h3><input id="checkissue" type="checkbox" name="checkbox" value="issue" /><label for="checkissue"> Verify you want to anonymize patron checkout history</label></h3>
         <br />
         <ul>
diff --git a/misc/cronjobs/batch_anonymise.pl b/misc/cronjobs/batch_anonymise.pl
index b2678cae10..7532e3fc52 100755
--- a/misc/cronjobs/batch_anonymise.pl
+++ b/misc/cronjobs/batch_anonymise.pl
@@ -45,6 +45,7 @@ Usage: $0  --days DAYS  [-h|--help]
    -v --verbose       gives a little more information
    -h --help          prints this help message, and exits, ignoring all
                       other options
+Note: If the system preference 'AnonymousPatron' is not defined, NULL will be used.
 USAGE
     exit $_[0];
 }