diff --git a/reactos/drivers/network/ndis/ndis/io.c b/reactos/drivers/network/ndis/ndis/io.c
index 7ea14b4c814..b7cc89c638a 100644
--- a/reactos/drivers/network/ndis/ndis/io.c
+++ b/reactos/drivers/network/ndis/ndis/io.c
@@ -308,7 +308,7 @@ NdisMAllocateMapRegisters(
   
   if(DmaSize == NDIS_DMA_64BITS)
     Description.Dma64BitAddresses = TRUE;
-  else
+  else if(DmaSize == NDIS_DMA_32BITS)
     Description.Dma32BitAddresses = TRUE;
 
   AdapterObject = IoGetDmaAdapter(