diff --git a/src/browser/ui/React.js b/src/browser/ui/React.js
index ccd6cc0484..1801167e8e 100644
--- a/src/browser/ui/React.js
+++ b/src/browser/ui/React.js
@@ -45,6 +45,7 @@ var React = {
   Children: {
     map: ReactChildren.map,
     forEach: ReactChildren.forEach,
+    count: ReactChildren.count,
     only: onlyChild
   },
   DOM: ReactDOM,