diff --git a/esprima.js b/esprima.js
index 9eb5aa999..6ca387275 100644
--- a/esprima.js
+++ b/esprima.js
@@ -938,7 +938,6 @@ parseStatement: true, parseSourceElement: true */
                     case 't':
                         str += '\t';
                         break;
-                    case 'u':
                     case 'x':
                         restore = index;
                         unescaped = scanHexEscape(ch);
@@ -949,6 +948,9 @@ parseStatement: true, parseSourceElement: true */
                             str += ch;
                         }
                         break;
+                    case 'u':
+                        str += '\\u';
+                        break;
                     case 'b':
                         str += '\b';
                         break;
@@ -4449,6 +4451,8 @@ parseStatement: true, parseSourceElement: true */
 
     exports.modify = modify;
 
+    exports.traverse = traverse;
+
     exports.generate = generate;
 
     exports.Tracer = {