diff --git a/dlls/kernel/kernel32.spec b/dlls/kernel/kernel32.spec
index 65976a1292f..0454111a157 100644
--- a/dlls/kernel/kernel32.spec
+++ b/dlls/kernel/kernel32.spec
@@ -844,7 +844,7 @@
 @ stdcall PeekConsoleInputA(ptr ptr long ptr)
 @ stdcall PeekConsoleInputW(ptr ptr long ptr)
 @ stdcall PeekNamedPipe(long ptr long ptr ptr ptr)
-@ stub PostQueuedCompletionStatus
+@ stdcall PostQueuedCompletionStatus(long long ptr ptr)
 @ stdcall PrepareTape(ptr long long)
 @ stub PrivCopyFileExW
 @ stub PrivMoveFileIdentityW
diff --git a/dlls/kernel/sync.c b/dlls/kernel/sync.c
index ef61cf06613..5a2535e7b64 100644
--- a/dlls/kernel/sync.c
+++ b/dlls/kernel/sync.c
@@ -1852,6 +1852,14 @@ BOOL WINAPI GetQueuedCompletionStatus( HANDLE CompletionPort, LPDWORD lpNumberOf
     return FALSE;
 }
 
+BOOL WINAPI PostQueuedCompletionStatus( HANDLE CompletionPort, DWORD dwNumberOfBytes,
+                                        ULONG_PTR dwCompletionKey, LPOVERLAPPED lpOverlapped)
+{
+    FIXME("%p %ld %08lx %p\n", CompletionPort, dwNumberOfBytes, dwCompletionKey, lpOverlapped );
+    SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
+    return FALSE;
+}
+
 /******************************************************************************
  *		CreateJobObjectW (KERNEL32.@)
  */
diff --git a/include/winbase.h b/include/winbase.h
index 7b193d49924..650cf965650 100644
--- a/include/winbase.h
+++ b/include/winbase.h
@@ -1810,6 +1810,7 @@ VOID        WINAPI OutputDebugStringA(LPCSTR);
 VOID        WINAPI OutputDebugStringW(LPCWSTR);
 #define     OutputDebugString WINELIB_NAME_AW(OutputDebugString)
 BOOL        WINAPI PeekNamedPipe(HANDLE,PVOID,DWORD,PDWORD,PDWORD,PDWORD);
+BOOL        WINAPI PostQueuedCompletionStatus(HANDLE,DWORD,ULONG_PTR,LPOVERLAPPED);
 DWORD       WINAPI PrepareTape(HANDLE,DWORD,BOOL);
 BOOL        WINAPI ProcessIdToSessionId(DWORD,DWORD*);
 BOOL        WINAPI PrivilegeCheck(HANDLE,PPRIVILEGE_SET,LPBOOL);