diff --git a/ProgressBar.js b/ProgressBar.js
index a21e79e..cd31831 100644
--- a/ProgressBar.js
+++ b/ProgressBar.js
@@ -31,7 +31,7 @@ var ProgressBar = React.createClass({
 
   getInitialState() {
     return {
-      progress: new Animated.Value(this.props.initialProgress || 0)
+      progress: new Animated.Value(this.props.progress || 0)
     };
   },