diff --git a/koha-tmpl/intranet-tmpl/prog/en/modules/catalogue/detail.tt b/koha-tmpl/intranet-tmpl/prog/en/modules/catalogue/detail.tt
index 89302d56d9..7ccecb9cdf 100644
--- a/koha-tmpl/intranet-tmpl/prog/en/modules/catalogue/detail.tt
+++ b/koha-tmpl/intranet-tmpl/prog/en/modules/catalogue/detail.tt
@@ -1835,7 +1835,7 @@
                 // Disable management if there's a duedate
                 if(duedate) {
                     bundle_toolbar.children('.btn').addClass("disabled");
-                    bundle_toolbar.attr("title", __("This bundle is checked out, it cannot be modified"));
+                    bundle_toolbar.attr("title", _("This bundle is checked out, it cannot be modified"));
                 }
 
                 // This is the table we'll convert into a DataTable