Index: win_iocp_io_service.ipp
===================================================================
--- win_iocp_io_service.ipp	(revision 85163)
+++ win_iocp_io_service.ipp	(working copy)
@@ -236,7 +236,7 @@
   op->ready_ = 1;
 
   // Enqueue the operation on the I/O completion port.
-  if (!::PostQueuedCompletionStatus(iocp_.handle, 0, 0, op))
+  if (!::PostQueuedCompletionStatus(iocp_.handle, 0, overlapped_contains_result, op))
   {
     // Out of resources. Put on completed queue instead.
     mutex::scoped_lock lock(dispatch_mutex_);
@@ -256,7 +256,7 @@
     op->ready_ = 1;
 
     // Enqueue the operation on the I/O completion port.
-    if (!::PostQueuedCompletionStatus(iocp_.handle, 0, 0, op))
+    if (!::PostQueuedCompletionStatus(iocp_.handle, 0, overlapped_contains_result, op))
     {
       // Out of resources. Put on completed queue instead.
       mutex::scoped_lock lock(dispatch_mutex_);
@@ -283,7 +283,7 @@
   if (::InterlockedCompareExchange(&op->ready_, 1, 0) == 1)
   {
     // Enqueue the operation on the I/O completion port.
-    if (!::PostQueuedCompletionStatus(iocp_.handle, 0, 0, op))
+    if (!::PostQueuedCompletionStatus(iocp_.handle, 0, overlapped_contains_result, op))
     {
       // Out of resources. Put on completed queue instead.
       mutex::scoped_lock lock(dispatch_mutex_);