diff --git a/lib/index.js b/lib/index.js
index 4fdce74..f3e5b77 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -222,7 +222,7 @@ function RpcBuilder(packer, options, transport, onRequest)
 
   function transportMessage(event)
   {
-    self.decode(event.data || event);
+    self.decode(event.data || event.toString());
   };
 
   this.getTransport = function()