diff --git a/src/component/toolbox.js b/src/component/toolbox.js
index 1f3698e18c6908c6ce1aa29221434511fac440b4..858d548d0fc0d493aa40cc44f94a642334109906 100644
--- a/src/component/toolbox.js
+++ b/src/component/toolbox.js
@@ -959,6 +959,7 @@ define(function (require) {
         function dispose() {
             if (_dataView) {
                 _dataView.dispose();
+                _dataView = null;
             }
 
             self.clear();