diff --git a/src/addons/transitions/ReactTransitionGroup.js b/src/addons/transitions/ReactTransitionGroup.js
index 55c5221af526d..f33a8f3d5d725 100644
--- a/src/addons/transitions/ReactTransitionGroup.js
+++ b/src/addons/transitions/ReactTransitionGroup.js
@@ -266,6 +266,7 @@ var ReactTransitionGroup = React.createClass({
     delete props.childFactory;
     delete props.transitionLeaveTimeout;
     delete props.transitionEnterTimeout;
+    delete props.transitionAppearTimeout;
     delete props.component;
 
     return React.createElement(