diff --git a/lib/common-node.js b/lib/common-node.js
index 12c45b2..8ca9593 100644
--- a/lib/common-node.js
+++ b/lib/common-node.js
@@ -5,6 +5,8 @@
 
 var querystring = require('querystring')
 
+var MAX_UINT = Math.pow(2, 32) - 1
+
 exports.IPV4_RE = /^[\d\.]+$/
 exports.IPV6_RE = /^[\da-fA-F:]+$/
 
@@ -25,6 +27,7 @@ exports.EVENT_NAMES = {
 }
 
 function toUInt32 (n) {
+  if (n > MAX_UINT) n = MAX_UINT
   var buf = new Buffer(4)
   buf.writeUInt32BE(n, 0)
   return buf