diff --git a/koha-tmpl/intranet-tmpl/prog/en/modules/members/member.tt b/koha-tmpl/intranet-tmpl/prog/en/modules/members/member.tt
index e81b6aedd2..de656f42d9 100644
--- a/koha-tmpl/intranet-tmpl/prog/en/modules/members/member.tt
+++ b/koha-tmpl/intranet-tmpl/prog/en/modules/members/member.tt
@@ -294,6 +294,7 @@
                         $(this).prop("checked", true).change();
                     }
                 });
+                $("#merge-patrons").prop("disabled", true);
             });
             $("#clear_all").on("click", function (e) {
                 e.preventDefault();