diff --git a/lib/6to5/transformation/transformers/react.js b/lib/6to5/transformation/transformers/react.js
index 8b9af5894a..3a7f29cdeb 100644
--- a/lib/6to5/transformation/transformers/react.js
+++ b/lib/6to5/transformation/transformers/react.js
@@ -27,7 +27,6 @@ var addDisplayName = function (id, call) {
   var safe = true;
 
   _.each(props, function (prop) {
-    var key = prop.key;
     if (t.isIdentifier(prop.key, { name: "displayName" })) {
       return safe = false;
     }