diff --git a/MdePkg/Include/IndustryStandard/SmBus.h b/MdePkg/Include/IndustryStandard/SmBus.h
index c557e203dd..27687f8a70 100644
--- a/MdePkg/Include/IndustryStandard/SmBus.h
+++ b/MdePkg/Include/IndustryStandard/SmBus.h
@@ -41,8 +41,6 @@ typedef struct {
   UINTN SmbusDeviceAddress : 7;
 } EFI_SMBUS_DEVICE_ADDRESS;
 
-typedef UINTN EFI_SMBUS_DEVICE_COMMAND;
-
 typedef enum _EFI_SMBUS_OPERATION
 {
   EfiSmbusQuickRead,
diff --git a/MdePkg/Library/PeiServicesTablePointerLibIdt/InternalPeiServicesTablePointer.h b/MdePkg/Library/PeiServicesTablePointerLibIdt/InternalPeiServicesTablePointer.h
index 51d2d92202..8841cea033 100644
--- a/MdePkg/Library/PeiServicesTablePointerLibIdt/InternalPeiServicesTablePointer.h
+++ b/MdePkg/Library/PeiServicesTablePointerLibIdt/InternalPeiServicesTablePointer.h
@@ -32,4 +32,4 @@ AsmPeiSevicesTablePointer (
   );
 
 
-#endif
\ No newline at end of file
+#endif
diff --git a/MdePkg/Library/UefiScsiLib/UefiScsiLib.c b/MdePkg/Library/UefiScsiLib/UefiScsiLib.c
index ee576d7a14..ed8ca82335 100644
--- a/MdePkg/Library/UefiScsiLib/UefiScsiLib.c
+++ b/MdePkg/Library/UefiScsiLib/UefiScsiLib.c
@@ -256,7 +256,7 @@ SubmitModeSense10Command (
   ScsiIo->GetDeviceLocation (ScsiIo, &Target, &Lun);
 
   Cdb[0]                        = EFI_SCSI_OP_MODE_SEN10;
-  Cdb[1]                        = (UINT8) (Lun & 0xe0 + (DBDField << 3) & 0x08);
+  Cdb[1]                        = (UINT8) ((Lun & 0xe0) + ((DBDField << 3) & 0x08));
   Cdb[2]                        = (UINT8) ((PageControl & 0xc0) | (PageCode & 0x3f));
   Cdb[7]                        = (UINT8) (*DataLength >> 8);
   Cdb[8]                        = (UINT8) (*DataLength);