diff --git a/lib/jison.js b/lib/jison.js
index 1af81fb9b..3b01410d0 100755
--- a/lib/jison.js
+++ b/lib/jison.js
@@ -1359,7 +1359,13 @@ function parseError (str, hash) {
     if (hash.recoverable) {
         this.trace(str);
     } else {
-        throw new Error(str);
+        function _parseError (msg, hash) {
+            this.message = msg;
+            this.hash = hash;
+        }
+        _parseError.prototype = new Error();
+
+        throw new _parseError(str, hash);
     }
 }