diff --git a/koha-tmpl/intranet-tmpl/prog/en/includes/patron-search.inc b/koha-tmpl/intranet-tmpl/prog/en/includes/patron-search.inc
index 5f73e30f40..74ec8d5a4f 100644
--- a/koha-tmpl/intranet-tmpl/prog/en/includes/patron-search.inc
+++ b/koha-tmpl/intranet-tmpl/prog/en/includes/patron-search.inc
@@ -316,9 +316,8 @@
 
             // Build the aLengthMenu
             let aLengthMenu = [
-                [% Koha.Preference('PatronsPerPage') | html %], 10, 20, 50, 100, -1
+                ...new Set([[% Koha.Preference('PatronsPerPage') | html %], 10, 20, 50, 100, -1])
             ];
-            jQuery.unique(aLengthMenu);
             aLengthMenu.sort(function( a, b ){
                 // Put "All" at the end
                 if ( a == -1 ) {