diff --git a/lib/6to5/transformation/transformers/spec/block-scoped-functions.js b/lib/6to5/transformation/transformers/spec/block-scoped-functions.js
index 9aeffc454f..963a08597c 100644
--- a/lib/6to5/transformation/transformers/spec/block-scoped-functions.js
+++ b/lib/6to5/transformation/transformers/spec/block-scoped-functions.js
@@ -2,7 +2,7 @@
 
 var t = require("../../../types");
 
-exports.BlockStatement = function (node, parent) {
+exports.BlockStatement = function (node, parent, scope, file) {
   if ((t.isFunction(parent) && parent.body === node) || t.isExportDeclaration(parent)) {
     return;
   }
@@ -22,5 +22,7 @@ exports.BlockStatement = function (node, parent) {
     func.id = null;
 
     node.body[i] = declar;
+
+    file.checkNode(declar);
   }
 };