diff --git a/about.pl b/about.pl
index 96a8b5a683..b9508c6f5d 100755
--- a/about.pl
+++ b/about.pl
@@ -68,6 +68,10 @@ my $warnPrefBiblioAddsAuthorities = ( $prefAutoCreateAuthorities && ( !$prefBibl
 my $prefEasyAnalyticalRecords  = C4::Context->preference('EasyAnalyticalRecords');
 my $prefUseControlNumber  = C4::Context->preference('UseControlNumber');
 my $warnPrefEasyAnalyticalRecords  = ( $prefEasyAnalyticalRecords  && $prefUseControlNumber );
+my $warnPrefAnonymousPatron = (
+    C4::Context->preference('OPACPrivacy')
+        and not C4::Context->preference('AnonymousPatron')
+);
 
 my $errZebraConnection = C4::Context->Zconn("biblioserver",0)->errcode();
 
@@ -86,6 +90,7 @@ $template->param(
     prefAutoCreateAuthorities => $prefAutoCreateAuthorities,
     warnPrefBiblioAddsAuthorities => $warnPrefBiblioAddsAuthorities,
     warnPrefEasyAnalyticalRecords  => $warnPrefEasyAnalyticalRecords,
+    warnPrefAnonymousPatron => $warnPrefAnonymousPatron,
     errZebraConnection => $errZebraConnection,
     warnIsRootUser => $warnIsRootUser,
 );
diff --git a/koha-tmpl/intranet-tmpl/prog/en/modules/about.tt b/koha-tmpl/intranet-tmpl/prog/en/modules/about.tt
index 258c77a2cc..42ecc6bc46 100644
--- a/koha-tmpl/intranet-tmpl/prog/en/modules/about.tt
+++ b/koha-tmpl/intranet-tmpl/prog/en/modules/about.tt
@@ -104,7 +104,7 @@
             <p>Please log in instead with a regular staff account. To create a staff account, create a library, a patron category 'Staff' and add a new patron. Then give this patron permissions from 'More' in the toolbar.</p>
         [% END %]
             <h2>Warnings regarding the system configuration</h2>
-        [% IF ( (warnPrefBiblioAddsAuthorities) || warnPrefEasyAnalyticalRecords ) %]
+        [% IF warnPrefBiblioAddsAuthorities || warnPrefEasyAnalyticalRecords || warnPrefAnonymousPatron %]
         <table>
             <caption>Preferences</caption>
             [% IF (warnPrefBiblioAddsAuthorities) %]
@@ -113,6 +113,9 @@
             [% IF (warnPrefEasyAnalyticalRecords) %]
             <tr><th scope="row"><b>Warning</b> </th><td>System preference 'EasyAnalyticalRecords' set, but UseControlNumber preference is set to 'Use'. Set it to 'Don't use' or else the 'Show analytics' links in the staff client and the OPAC will be broken.</td></tr>
             [% END %]
+            [% IF warnPrefAnonymousPatron %]
+                <tr><th scope="row"><b>Warning</b> </th><td>System preference 'OPACPrivacy' set, but AnonymousPatron preference is set to '0'. Set it to a valid borrower number if you want that this feature works correctly.</td></tr>
+            [% END %]
         </table>
         [% ELSE %]
             <p>No warnings</p>