diff --git a/MdeModulePkg/Bus/Scsi/ScsiDiskDxe/ScsiDisk.c b/MdeModulePkg/Bus/Scsi/ScsiDiskDxe/ScsiDisk.c
index b5eff25b9b..2289f20152 100644
--- a/MdeModulePkg/Bus/Scsi/ScsiDiskDxe/ScsiDisk.c
+++ b/MdeModulePkg/Bus/Scsi/ScsiDiskDxe/ScsiDisk.c
@@ -1,7 +1,7 @@
 /** @file
   SCSI disk driver that layers on every SCSI IO protocol in the system.
 
-Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>
 This program and the accompanying materials
 are licensed and made available under the terms and conditions of the BSD License
 which accompanies this distribution.  The full text of the license may be found at
@@ -2754,7 +2754,7 @@ GetMediaInfo (
   UINT8       *Ptr;
 
   if (!ScsiDiskDevice->Cdb16Byte) {
-    ScsiDiskDevice->BlkIo.Media->LastBlock =  (Capacity10->LastLba3 << 24) |
+    ScsiDiskDevice->BlkIo.Media->LastBlock =  ((UINT32) Capacity10->LastLba3 << 24) |
                                               (Capacity10->LastLba2 << 16) |
                                               (Capacity10->LastLba1 << 8)  |
                                                Capacity10->LastLba0;