diff --git a/lib/socket.io/utils.js b/lib/socket.io/utils.js
index ba2fdeca20..18ab8e59df 100644
--- a/lib/socket.io/utils.js
+++ b/lib/socket.io/utils.js
@@ -40,7 +40,7 @@ exports.decode = function(data){
       if (data.substr(i, 1) == n){
         number += n;
       } else {  
-        data = data.substr(number.length + frame.length)
+        data = data.substr(number.length + frame.length);
         number = Number(number);
         break;
       }