diff --git a/reactos/drivers/storage/scsiport/scsiport.c b/reactos/drivers/storage/scsiport/scsiport.c
index bf575f92117..b69e957558c 100644
--- a/reactos/drivers/storage/scsiport/scsiport.c
+++ b/reactos/drivers/storage/scsiport/scsiport.c
@@ -1207,7 +1207,7 @@ ByeBye:
 VOID STDCALL
 ScsiPortIoMapTransfer(IN PVOID HwDeviceExtension,
 		      IN PSCSI_REQUEST_BLOCK Srb,
-		      IN ULONG LogicalAddress,
+		      IN PVOID LogicalAddress,
 		      IN ULONG Length)
 {
   DPRINT1("ScsiPortIoMapTransfer()\n");