diff --git a/lib/core.js b/lib/core.js
index 08a2f17..ae5b5eb 100644
--- a/lib/core.js
+++ b/lib/core.js
@@ -21,7 +21,7 @@ module.exports = {
     var extras = ['clear', 'stop', 'resize', 'toBase64Image', 'generateLegend', 'update', 'addData', 'removeData'];
     function extra(type) {
       classData[type] = function() {
-        this.state.chart[name].apply(this.state.chart, arguments);
+        return this.state.chart[type].apply(this.state.chart, arguments);
       };
     }