diff --git a/web/skins/classic/views/js/events.js b/web/skins/classic/views/js/events.js
index 90bce5f5f..442eca616 100644
--- a/web/skins/classic/views/js/events.js
+++ b/web/skins/classic/views/js/events.js
@@ -35,7 +35,7 @@ var params =
 
 // Called by bootstrap-table to retrieve zm event data
 function ajaxRequest(params) {
-  if ( params.data.filter ) {
+  if ( params.data && params.data.filter ) {
     params.data.advsearch = params.data.filter;
     delete params.data.filter;
   }