diff --git a/lib/js/src/thrift.js b/lib/js/src/thrift.js
index 34be450..c846162 100644
--- a/lib/js/src/thrift.js
+++ b/lib/js/src/thrift.js
@@ -272,6 +272,25 @@
     return this.code;
 };
 
+Thrift.TProtocolExceptionType = {
+    UNKNOWN: 0,
+    INVALID_DATA: 1,
+    NEGATIVE_SIZE: 2,
+    SIZE_LIMIT: 3,
+    BAD_VERSION: 4,
+    NOT_IMPLEMENTED: 5,
+    DEPTH_LIMIT: 6
+};
+
+Thrift.TProtocolException = function TProtocolException(type, message) {
+    Error.call(this);
+    Error.captureStackTrace(this, this.constructor);
+    this.name = this.constructor.name;
+    this.type = type;
+    this.message = message;
+};
+Thrift.inherits(Thrift.TProtocolException, Thrift.TException, 'TProtocolException');
+
 /**
  * Constructor Function for the XHR transport.
  * If you do not specify a url then you must handle XHR operations on