diff --git a/src/core.js b/src/core.js
index 2aa9146..07aa9b9 100644
--- a/src/core.js
+++ b/src/core.js
@@ -61,6 +61,7 @@ nv.render = function render(step) {
   }, 0);
 };
 
+nv.render.active = false;
 nv.render.queue = [];
 
 nv.addGraph = function(obj) {