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-rw-r--r--lib/pure/asyncdispatch.nim4
1 files changed, 2 insertions, 2 deletions
diff --git a/lib/pure/asyncdispatch.nim b/lib/pure/asyncdispatch.nim
index 64966c6b5..b662c3095 100644
--- a/lib/pure/asyncdispatch.nim
+++ b/lib/pure/asyncdispatch.nim
@@ -374,7 +374,7 @@ proc adjustedTimeout(p: PDispatcherBase, timeout: int): int {.inline.} =
 when defined(windows) or defined(nimdoc):
   import winlean, sets, hashes
   type
-    CompletionKey = Dword
+    CompletionKey = ULONG_PTR
 
     CompletionData* = object
       fd*: AsyncFD # TODO: Rename this.
@@ -439,7 +439,7 @@ when defined(windows) or defined(nimdoc):
       else: at.int32
 
     var lpNumberOfBytesTransferred: Dword
-    var lpCompletionKey: ULONG
+    var lpCompletionKey: ULONG_PTR
     var customOverlapped: PCustomOverlapped
     let res = getQueuedCompletionStatus(p.ioPort,
         addr lpNumberOfBytesTransferred, addr lpCompletionKey,