diff --git a/lib/io/ioserver.js b/lib/io/ioserver.js
index 33c4ce44..8c8b2b94 100644
--- a/lib/io/ioserver.js
+++ b/lib/io/ioserver.js
@@ -136,7 +136,7 @@ function handleConnection(sock) {
 
     var srv = Server.getServer();
 
-    if (throttleIP(ip)) {
+    if (throttleIP(sock)) {
         return;
     }