diff --git a/lib/node-progress.js b/lib/node-progress.js
index 8691327..638d919 100644
--- a/lib/node-progress.js
+++ b/lib/node-progress.js
@@ -102,6 +102,10 @@ ProgressBar.prototype.tick = function(len, tokens){
  */
 
 ProgressBar.prototype.render = function(tokens){
+  if(!process.stdout.isTTY) {
+    return;
+  }
+
   var percent = (this.curr >= this.total) ? 100 : this.curr / this.total * 100
     , complete = Math.round(this.width * (this.curr / this.total))
     , incomplete