diff --git a/about.pl b/about.pl
index 376f77c6aa..90b434904c 100755
--- a/about.pl
+++ b/about.pl
@@ -201,6 +201,10 @@ my $warnPrefAnonymousPatronOPACPrivacy_PatronDoesNotExist = ( not $anonymous_pat
 
 my $warnPrefKohaAdminEmailAddress = not Email::Valid->address(C4::Context->preference('KohaAdminEmailAddress'));
 
+my $c = Koha::Items->filter_by_visible_in_opac->count;
+my @warnings = C4::Context->dbh->selectrow_array('SHOW WARNINGS');
+my $warnPrefOpacHiddenItems = $warnings[2];
+
 my $invalid_yesno = Koha::Config::SysPrefs->search(
     {
         type  => 'YesNo',
@@ -601,6 +605,7 @@ $template->param(
     warnPrefAnonymousPatronOPACPrivacy_PatronDoesNotExist     => $warnPrefAnonymousPatronOPACPrivacy_PatronDoesNotExist,
     warnPrefAnonymousPatronAnonSuggestions_PatronDoesNotExist => $warnPrefAnonymousPatronAnonSuggestions_PatronDoesNotExist,
     warnPrefKohaAdminEmailAddress => $warnPrefKohaAdminEmailAddress,
+    warnPrefOpacHiddenItems => $warnPrefOpacHiddenItems,
     errZebraConnection => $errZebraConnection,
     warnIsRootUser => $warnIsRootUser,
     warnNoActiveCurrency => $warnNoActiveCurrency,
diff --git a/koha-tmpl/intranet-tmpl/prog/en/modules/about.tt b/koha-tmpl/intranet-tmpl/prog/en/modules/about.tt
index f589c65810..7ec5f4d7b5 100644
--- a/koha-tmpl/intranet-tmpl/prog/en/modules/about.tt
+++ b/koha-tmpl/intranet-tmpl/prog/en/modules/about.tt
@@ -215,7 +215,7 @@
         </div>
 
         <div id="sysinfo">
-    [% IF warnPrefBiblioAddsAuthorities || warnPrefEasyAnalyticalRecords || warnPrefAnonymousPatronOPACPrivacy || warnPrefAnonymousPatronAnonSuggestions || warnPrefAnonymousPatronOPACPrivacy_PatronDoesNotExist || warnPrefAnonymousPatronAnonSuggestions_PatronDoesNotExist || warnPrefKohaAdminEmailAddress || invalid_yesno.count || warnNoActiveCurrency || warnIsRootUser || xml_config_warnings.size || AutoSelfCheckPatronDoesNotHaveSelfCheckPerm || AutoSelfCheckPatronHasTooManyPerm || warnStatisticsFieldsError || warnNoTemplateCaching || warnILLConfiguration || has_ai_issues || oauth2_missing_deps || bad_yaml_prefs || warnRelationships || log4perl_errors || config_bcrypt_settings_no_set || warnHiddenBiblionumbers.size || warnConnectBroker %]
+    [% IF warnPrefBiblioAddsAuthorities || warnPrefEasyAnalyticalRecords || warnPrefAnonymousPatronOPACPrivacy || warnPrefAnonymousPatronAnonSuggestions || warnPrefAnonymousPatronOPACPrivacy_PatronDoesNotExist || warnPrefAnonymousPatronAnonSuggestions_PatronDoesNotExist || warnPrefKohaAdminEmailAddress || warnPrefOpacHiddenItems || invalid_yesno.count || warnNoActiveCurrency || warnIsRootUser || xml_config_warnings.size || AutoSelfCheckPatronDoesNotHaveSelfCheckPerm || AutoSelfCheckPatronHasTooManyPerm || warnStatisticsFieldsError || warnNoTemplateCaching || warnILLConfiguration || has_ai_issues || oauth2_missing_deps || bad_yaml_prefs || warnRelationships || log4perl_errors || config_bcrypt_settings_no_set || warnHiddenBiblionumbers.size || warnConnectBroker %]
         [% IF (warnIsRootUser) %]
             <h2>Warning regarding current user</h2>
             <p>You are logged in as the database administrative user. This is not recommended because some parts of Koha will not function as expected when using this account.</p>
@@ -299,7 +299,7 @@
             Contact your system administrator.
         [% END %]
 
-        [% IF warnPrefBiblioAddsAuthorities || warnPrefEasyAnalyticalRecords || warnPrefAnonymousPatronOPACPrivacy || warnPrefAnonymousPatronAnonSuggestions || warnPrefAnonymousPatronOPACPrivacy_PatronDoesNotExist || warnPrefAnonymousPatronAnonSuggestions_PatronDoesNotExist || warnPrefKohaAdminEmailAddress || invalid_yesno.count || warnNoActiveCurrency || AutoSelfCheckPatronDoesNotHaveSelfCheckPerm || AutoSelfCheckPatronHasTooManyPerm || warnStatisticsFieldsError || warnNoTemplateCaching || warnILLConfiguration || oauth2_missing_deps || bad_yaml_prefs || warnIssuingRules || config_bcrypt_settings_no_set || warnHiddenBiblionumbers.size || paypal_enabled %]
+        [% IF warnPrefBiblioAddsAuthorities || warnPrefEasyAnalyticalRecords || warnPrefAnonymousPatronOPACPrivacy || warnPrefAnonymousPatronAnonSuggestions || warnPrefAnonymousPatronOPACPrivacy_PatronDoesNotExist || warnPrefAnonymousPatronAnonSuggestions_PatronDoesNotExist || warnPrefKohaAdminEmailAddress || warnPrefOpacHiddenItems || invalid_yesno.count || warnNoActiveCurrency || AutoSelfCheckPatronDoesNotHaveSelfCheckPerm || AutoSelfCheckPatronHasTooManyPerm || warnStatisticsFieldsError || warnNoTemplateCaching || warnILLConfiguration || oauth2_missing_deps || bad_yaml_prefs || warnIssuingRules || config_bcrypt_settings_no_set || warnHiddenBiblionumbers.size || paypal_enabled %]
             <h2>Warnings regarding the system configuration</h2>
             <table>
                 <caption>Preferences and parameters</caption>
@@ -324,6 +324,9 @@
                 [% IF warnPrefKohaAdminEmailAddress %]
                     <tr><th scope="row"><strong>Warning</strong> </th><td>System preference 'KohaAdminEmailAddress' does not contain a valid email address. Emails will not be sent.</td></tr>
                 [% END %]
+                [% IF warnPrefOpacHiddenItems %]
+                    <tr><th scope="row"><strong>Warning</strong> </th><td>System preference 'OpacHiddenItems' generates a warning and will produce unexpected behaviors: [% warnPrefOpacHiddenItems | html %]</th></tr>
+                [% END %]
                 [% IF invalid_yesno.count %]
                     [% FOR p IN invalid_yesno %]
                         <tr><th scope="row"><strong>Warning</strong> </th><td>System preference '[% p.variable | html %]' must be '0' or '1', but is [% IF p.value.defined %]'[% p.value | html%]'[% ELSE %]NULL[% END %].</td></tr>
diff --git a/t/db_dependent/Koha/Items.t b/t/db_dependent/Koha/Items.t
index d1d910b020..73e1ab4a29 100755
--- a/t/db_dependent/Koha/Items.t
+++ b/t/db_dependent/Koha/Items.t
@@ -1494,7 +1494,7 @@ $schema->storage->txn_rollback;
 
 subtest 'filter_by_visible_in_opac() tests' => sub {
 
-    plan tests => 11;
+    plan tests => 12;
 
     $schema->storage->txn_begin;
 
@@ -1641,6 +1641,12 @@ subtest 'filter_by_visible_in_opac() tests' => sub {
         'The right item is returned'
     );
 
+    # Make sure the warning on the about page will work
+    $rules = { itemlost => ['AB'] };
+    my $c = Koha::Items->filter_by_visible_in_opac->count;
+    my @warnings = C4::Context->dbh->selectrow_array('SHOW WARNINGS');
+    is( $warnings[2], q{Truncated incorrect DOUBLE value: 'AB'});
+
     $schema->storage->txn_rollback;
 };