diff --git a/MdePkg/Include/Protocol/BlockIo.h b/MdePkg/Include/Protocol/BlockIo.h
index 7b332691ed..3bd76885e1 100644
--- a/MdePkg/Include/Protocol/BlockIo.h
+++ b/MdePkg/Include/Protocol/BlockIo.h
@@ -201,7 +201,7 @@ typedef struct {
 
 #define EFI_BLOCK_IO_PROTOCOL_REVISION  0x00010000
 #define EFI_BLOCK_IO_PROTOCOL_REVISION2 0x00020001
-#define EFI_BLOCK_IO_PROTOCOL_REVISION3 0x00020031
+#define EFI_BLOCK_IO_PROTOCOL_REVISION3 0x0002001F
 
 ///
 /// Revision defined in EFI1.1.