diff --git a/lib/transports/polling-jsonp.js b/lib/transports/polling-jsonp.js
index 45025ea2..c99cc20c 100644
--- a/lib/transports/polling-jsonp.js
+++ b/lib/transports/polling-jsonp.js
@@ -23,7 +23,7 @@ var rNewline = /\n/g
  * Global JSONP callbacks.
  */
 
-var callbacks = global.___eio = {};
+var callbacks = global.___eio = [];
 
 /**
  * Noop.