diff --git a/lib/6to5/util.js b/lib/6to5/util.js
index af2b740605..04e4e97ce3 100644
--- a/lib/6to5/util.js
+++ b/lib/6to5/util.js
@@ -7,7 +7,7 @@ var fs         = require("fs");
 var t          = require("./types");
 var _          = require("lodash");
 
-_.extend(estraverse.VisitorKeys, traverse.VISITOR_KEYS);
+_.extend(estraverse.VisitorKeys, t.VISITOR_KEYS);
 
 exports.inherits = util.inherits;
 
@@ -46,31 +46,6 @@ exports.isAbsolute = function (loc) {
   return false;
 };
 
-exports.getIds = function (node) {
-  var search = [node];
-  var ids  = [];
-
-  while (search.length) {
-    var id = search.shift();
-
-    if (t.isIdentifier(id)) {
-      ids.push(id.name);
-    } else if (t.isArrayPattern(id)) {
-      _.each(id.elements, function (elem) {
-        search.push(elem);
-      });
-    } else if (t.isObjectPattern(id)) {
-      _.each(id.properties, function (prop) {
-        search.push(prop.value);
-      });
-    } else {
-      throw new Error("unknown node " + id.type);
-    }
-  }
-
-  return ids;
-};
-
 exports.canCompile = function (filename) {
   var ext = path.extname(filename);
   return _.contains([".js", ".es6"], ext);