diff --git a/Chart/ChartAbstract.js b/Chart/ChartAbstract.js
index e469ae3..474bbc8 100644
--- a/Chart/ChartAbstract.js
+++ b/Chart/ChartAbstract.js
@@ -7,6 +7,7 @@
     
     jsOMS.Chart.ChartAbstract = function (id)
     {
+        /** global: d3 */
         this.chartId = id;
         this.chartSelect = d3.select('#' + this.chartId);