diff --git a/templates/workflow/run.mako b/templates/workflow/run.mako
index 48bb6e5514b..b0ceff21d12 100644
--- a/templates/workflow/run.mako
+++ b/templates/workflow/run.mako
@@ -75,7 +75,8 @@
             $('span.multiinput_wrap select[name*="|input"]').removeAttr('multiple').each(function(i, s) {
                 var select = $(s);
                 var new_width = Math.max(200, select.width()) + 20;
-                select.parent().prev().append(
+                // Find the label for this element.
+                select.closest('.form-row').children('label').append(
                     $('<span class="icon-button multiinput"></span>').click(function() {
                         if ($(this).hasClass('disabled')) return;
                         toggle_multiinput(select);