--- boost\asio\detail\impl\socket_ops.ipp.orig	2010-11-16 11:38:03.540394400 +0000
+++ boost\asio\detail\impl\socket_ops.ipp	2010-11-16 11:40:28.265394400 +0000
@@ -119,7 +119,7 @@
     socket_type new_socket = socket_ops::accept(s, addr, addrlen, ec);
 
     // Check if operation succeeded.
-    if (new_socket >= 0)
+    if (new_socket != invalid_socket)
       return new_socket;
 
     // Operation failed.