diff --git a/workflow/engine/js/processmap/core/processmap.js b/workflow/engine/js/processmap/core/processmap.js
index 0d1944693..39a2b63d2 100755
--- a/workflow/engine/js/processmap/core/processmap.js
+++ b/workflow/engine/js/processmap/core/processmap.js
@@ -2232,6 +2232,7 @@ var processmap=function(){
     /*
     * Aca se definen  TASK inicio y TASK a la que se deriva.
     */
+    event = event || window.event;
 
     if (event)
     {