diff --git a/lib/js/thrift.js b/lib/js/thrift.js
index 39b0a5c..e59f07f 100644
--- a/lib/js/thrift.js
+++ b/lib/js/thrift.js
@@ -552,7 +552,7 @@
 
 
     // Reading functions
-    readMessageBegin: function(name, messageType, seqid) {
+    readMessageBegin: function() {
         this.rstack = [];
         this.rpos = [];
 
@@ -658,7 +658,7 @@
 
     },
 
-    readMapBegin: function(keyType, valType, size) {
+    readMapBegin: function() {
         var map = this.rstack.pop();
 
         var r = {};
@@ -677,7 +677,7 @@
         this.readFieldEnd();
     },
 
-    readListBegin: function(elemType, size) {
+    readListBegin: function() {
         var list = this.rstack[this.rstack.length - 1];
 
         var r = {};