diff --git a/combo/apps/dataviz/static/js/chartngcell.js b/combo/apps/dataviz/static/js/chartngcell.js
index 71cf3b4f..99fc71ba 100644
--- a/combo/apps/dataviz/static/js/chartngcell.js
+++ b/combo/apps/dataviz/static/js/chartngcell.js
@@ -1,6 +1,6 @@
 function get_graph_querystring(extra_context, width=undefined) {
   qs = [];
-  if ($('#chart-filters')) {
+  if ($('#chart-filters').length) {
     qs.push($('#chart-filters').serialize());
     qs.push('filters_cell_id=' + $('body').data('filters-cell-id'));
   }