diff --git a/reactos/drivers/network/ndis/ndis/miniport.c b/reactos/drivers/network/ndis/ndis/miniport.c
index 31987486915..61ed3c81e37 100644
--- a/reactos/drivers/network/ndis/ndis/miniport.c
+++ b/reactos/drivers/network/ndis/ndis/miniport.c
@@ -1923,7 +1923,7 @@ NdisIPnPStartDevice(
   Adapter->NdisMiniportBlock.OldPnPDeviceState = Adapter->NdisMiniportBlock.PnPDeviceState;
   Adapter->NdisMiniportBlock.PnPDeviceState = NdisPnPDeviceStarted;
 
-  Timeout.QuadPart = (LONGLONG)Adapter->NdisMiniportBlock.CheckForHangSeconds * -1000000;
+  Timeout.QuadPart = Int32x32To64(Adapter->NdisMiniportBlock.CheckForHangSeconds, -1000000);
   KeSetTimerEx(&Adapter->NdisMiniportBlock.WakeUpDpcTimer.Timer, Timeout,
                Adapter->NdisMiniportBlock.CheckForHangSeconds * 1000,
                &Adapter->NdisMiniportBlock.WakeUpDpcTimer.Dpc);